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Bangboo VS Ethereal Event Guide for Zenless Zone Zero
Bangboo VS Ethereal is a Tower Defense Event where you will have to help Bangboos to protect their base from Ethereal intrusion! Help them out and receive generous rewards!
Bangboo VS Ethereal Event
This event will take place from December 20, 2024 until January 20, 2025!
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What is the Bangboo VS Ethereal Event About?
Bangboo VS Ethereal is a tower defence event where you will have to assist Bangboos in various tasks, in order to receive the prestigious Hollow Operation Certificate!
You will have to deploy different Bangboo in order to prevent Ethereals from approaching your base.
How do you Participate in the Bangboo VS Ethereal event?
This event will take place in the new Reverb Arena zone that releases with version 1.4 of the game.
You need to reach Inter-Knot Lv. 15 and complete Agent Story Mole in the Hole (I) to participate.
Head to the Reverb Arena and talk to Coach Aster.
During the event, you can find Coach Aster at Reverb Arena and assist it in guiding Bangboo to defeat Ethereals in various stages and complete the commissions. The stages will be gradually unlocked as the event progresses.
In the arena you will have to place and guide the Bangboos in order for them to fight and stop the Ethereals from reaching the objective. It is similar to any tower defence game you may have seen or played before.
Defeating the enemies will give you additional points that you can use to upgrade the Bangboos or the skills, helping you progress in further stages.
Your goal is to prevent enemies from entering the base. In order to do so, drag and drop the Bangboo to different positions on the assessment field. Once on the field, the Bangboo will attack any nearby enemy.
Deploying Bangboo costs Assessment Points, so make sure you have enough. The amount you have is shown down left, and it will constantly be refilled.
You can pause the game to observe the battlefield if it advances too fast.
Bangboo VS Ethereal Solutions
General Assessment 01
Enemies:
- Tyrfing
- Vicious Striker
- Tyrfing
Assessment Bangboo Positions:
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The first assessment is the tutorial, so you should be able to pass it no matter where
you put your Bangboos. We do recommend you choose to put two Boollseye Bangboo and one
Plugboo.
General Assessment 02
Enemies:
- Tyrfing
- Faun
- Vicious Striker
- Tyrfing
Assessment Bangboo Positions:
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Place Penguinboo first, it will serve as a last rampart against enemies.
After this one, place the
Plugboo as shown in the image bellow:
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We only used 5 Bangboo, but you can place an additional Boollseye or
Plugboo if you
want to be extra safe.
General Assessment 03
Enemies:
- Tyrfing
- Alpeca
- Faun
- Vicious Striker
Assessment Bangboo Positions:
Place Boollseye first, and as soon as you can, place
Penguinboo:
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From this stage on you can add buffs. For now you only have one, so use this one, but more will unlock as you advance through the stages.
General Assessment 04
Enemies:
- Tyrfing
- Alpeca
- Faun
- Vicious Striker
Assessment Bangboo Positions:
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After you placed the first Boollseye, get a
Penguinboo
on the floor to block one of the two entrances, and the enemies can pass through both ways this time.
We choose to put the first Penguin down left, with an
Avocaboo to heal him.
After you placed your two
Penguinboo to protect the exits, add a
Plugboo
towards the middle.
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Avocaboo can be really helpful especially for the
Penguinboo
who are on the floor and take more damage.
General Assessment 05
Enemies:
- Tyrfing
- Alpeca
- Faun
- Vicious Striker
Assessment Bangboo Positions:
Place the Boollseye first to have some range. Then put the
Penguinboo
right in the middle, and protect them both with
Avocaboo:
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You should have access to Avocaboo's buff, which increases his healing range. Make sure to use it.
General Assessment 06
Enemies:
- Tyrfing
- Alpeca
- Faun
- Vicious Striker
- Faun
- Vicious Striker
Assessment Bangboo Positions:
deploy Exploreboo first for more Assessment Points. Then place down a
Boollseye,
and right after a
Penguinboo in the middle. Finish with an
Avocaboo
that can protect them all:
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Continue with a Plugboo on top right, as enemies come in masses from there,
and another
Boollseye down left. If an enemy manages to go through, you can place
Plugboo
next to
Exploreboo instead.
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You will get Exploreboo for this stage. Deploy him first,
as he helps with Assessment point regeneration.
Special Environment Assessment 01
Enemies:
- Tyrfing
- Blastcrawler
- Vicious Striker
- Blastcrawler
- Vicious Striker
This time the stage is a bit different. Gas Burners are present on the stage and any Bangboo
standing on them continuously take damage. Make sure to pick Avocaboo
as a buff, as he will be needed! You can also pick
Exploreboo as
second buff for faster assessment point regeneration.
Assessment Bangboo Positions:
Start with Boollseye,
Exploreboo, and a
Penguinboo
at the end to block the exit if needed.
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Protect the line down with a Penguinboo and
Boollseye,
and add an
Avocaboo towards the middle. The last Bangboo you add can
be another
Penguinboo on a Gas Burner near the
Avocaboo.
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Special Environment Assessment 02
Enemies:
- Blastcrawler
- Blastcrawler
Take Exploreboo and
Avocaboo again as buffs.
Assessment Bangboo Positions:
Place Exploreboo directly for regen, and then a
Paperboo
on the top line, with an
Avocaboo to protect it.
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Add another Paperboo on the line down, with an
Avocaboo
for healing
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Add another Paperboo on top, but leave one square free in between
with the first one, otherwise when the enemies explode they will hit both. Put down an
Avocaboo on top, you will need it.
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Special Environment Assessment 03
Enemies:
- Tyrfing
- Hoplitai
- Faun
- Hoplitai
- Faun
Use Paperboo and
Avocaboo buffs.
Assessment Bangboo Positions:
Place Paperboo down first, and as soon as you can, place
Avocaboo:
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Do the same on the top line, and add two Penguinboo in the middle.
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Special Environment Assessment 04
Enemies:
- Tyrfing
- Golden Bangboo
- Faun
- Vicious Striker
- Tyrfing
- Faun
This stage has a special Bangboo enemy. It will not attack your own Bangboo, but if you defeat it you will get a pleasant surprise.
Pick Paperboo and
Avocaboo as buff.
Assessment Bangboo Positions:
Place two Exploreboo at the start, this time you will need
more assessment point regeneration. As soon as possible, place a
Penguinboo
in the middle.
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Protect Penguinboo with an
Avocaboo, and add a
Boollseye on top.
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Use Rocketboo when the Golden Bangboo appears (Rocketboo does not
stay in place, he will just explode on the Golden Bangboo and leave). Add two more
Boollseye to make sure to defeat the Golden Bangboo.
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Remove the Bollseyes top left, and replace it with a Paperboo
to protect the line down. You can also remove an
Exploreboo now,
and replace it with a
Plugboo.
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When the last wave of enemies arrive on top, remove the entrance Boollseye
and use a
Rocketboo on the wave.
Special Environment Assessment 05
Enemies:
- Dullahan
- Tyrfing
- Faun
- Vicious Striker
- Vicious Striker
use Avocaboo and
Paperboo buff, and the Grill Mode chip.
Assessment Bangboo Positions:
Place two Exploreboo in the middle, a
Paperboo on top
and a
Penguinboo to protect the line down.
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Once your Paperboo is not on cooldown anymore, replace the
Penguinboo
with another
Paperboo.
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Add two Plugboo in the middle to help with damage, and use a
Rocketboo
on the top lane when there is too many enemies.
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Add Avocaboo and upgrade it, in order to make it through Dullahan.
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Special Environment Assessment 06
Enemies:
- Dullahan
- Dullahan
- Tyrfing
- Faun
- Faun
- Blastcrawler
- Vicious Striker
Use Paperboo and
Plugboo buffs. Use the Grill Mode Chip.
Assessment Bangboo Positions:
Deploy two Exploreboo on each sides, and a
Paperboo
with a
Plugboo on top. Once the cooldown is down, add a
Paperboo
on the bottom line as well.
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Place Plugboo on the bottom line as well, and add two
Avocaboo
on each line. The exploding enemies will destroy your
Plugboo, but you will have
time to add two new ones. Remove an
Exploreboo if needed. Upgrade the two new
Plugboo.
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Once Dullahan arrives, you can use a Rocketboo on one of them, or
remove
Exploreboo and replace it with another
Plugboo
if you miss damage.
Tactical Qualification Assessment 01
Enemies:
- Tyrfing
- Ahriman
- Alpeca
- Faun
- Vicious Striker
Take Penguinboo and
Plugboo buffs. Pick the Exam
integration Chip. For this round, Blowers will be on the battlefield. If you place
any Bangboo on them they get an increased skill effect range boost.
Assessment Bangboo Positions:
Start with an Exploreboo and a
Boollseye on
the boost in the middle. Add
Penguinboo near the exit to intercept the enemies
circling around the place. Protect the exit with
Paperboo.
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Add Avocaboo to protect
Penguinboo, and a
Boollseye on another boost.
Replace Exploreboo with an
Avocaboo next to the
Boollseye in the middle.
Add another
Paperboo and
Penguinboo to protect the second exit.
Upgrade your Penguinboo when possible.
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Tactical Qualification Assessment 02
Enemies:
- Tyrfing
- Ahriman
- Alpeca
- Faun
- Blastcrawler
- Vicious Striker
- Vicious Striker
From this round on, you have access to Faction Bangboos. They can only be used for one round, but are more powerful than normal Bangboo.
Take Penguinboo and
Paperboo as buffs. use the Exam
Integration Chip.
Assessment Bangboo Positions:
Place the Bangboo in the following order: Exploreboo,
Plugboo,
Penguinboo on the bottom line,
Avocaboo,
Penguinboo
on the top line middle,
Amillion, and a
Boollseye on the bottom line.
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Add another Penguinboo on the top line near the exit. Replace
Exploreboo
with a
Plugboo that you place on top near the exit.
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Tactical Qualification Assessment 03
Enemies:
- Arlaune
- Tyrfing
- Alpeca
- Blascrawler
- Vicious Striker
Use Penguinboo and
Avocaboo buffs. Take the Exam integration Chip.
Assessment Bangboo Positions:
Place an Exploreboo and
Amillion in the middle.
Add a
Boollseye on the left side on the boost.
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Add Penguinboo on the left before the exit, and
Safety on the right
before the exit. Place
Plugboo on the boost on the right, and an
Avocaboo
to protect them.
Upgrade Penguinboo and the two
Avocaboo.
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Tactical Qualification Assessment 04
Enemies:
- Tyrfing
- Hoplitai
- Faun
- Vicious Striker
- Tyrfing
Pick Paperboo and
Penguinboo as buff. Take the Exam Integration Chip.
Assessment Bangboo Positions:
You can only place Bangboo on the ground this time. Place Safety in the middle
where all enemies pass. Add
Butler, he will heal everyone around him.
Add
Penguinboo for damage, and a
Paperboo for blockage behind.
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You can add another Penguinboo on top of
Paperboo
if you want, or use a
Rocketboo towards the end on the two bigger enemies
to kill them faster.
Tactical Qualification Assessment 05
Enemies:
- Arlaune
- Dullahan
- Tyrfing
- Ahriman
- Alpeca
- Hoplitai
- Faun
- Blastcrawler
- Vicious Striker
- Tyrfing
- Blastcrawler
use Plugboo and
Boollseye buff, and the Exam Integration chip.
Assessment Bangboo Positions:
Place Exploreboo and
Paperboo on the bottom line,
and protect them with
Avocaboo as soon as possible. Add
Amillion
on the boost on top as soon as available to fight off the incoming flying enemies.
Put down
Penguinboo near Amillion on top to help.
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Add Boollseye on the bottom line to help with damage, and remove
Exploreboo
to replace with
Plugboo on top. Upgrade them when possible.
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Tactical Qualification Assessment 06
Enemies:
- Arlaune
- Dullahan
- Tyrfing
- Blastcrawler
- Vicious Striker
Use Boollseye and
Plugboo buffs. Use the Exam integration Chip.
Assessment Bangboo Positions:
Start with Exploreboo, and place
Paperboo as soon as possible.
Add
Butler when available in the middle.
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Place Boollseye on the boost in the middle, and
Plugboo on the right.
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Add Amillion down left, and
Penguinboo to protect the right exit.
You cna upgrad
Plugboo and
Boollseye.
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Special Assessment 01
Enemies:
- Dullahan
- Tyrfing
- Blascrawler
- Vicious Striker
You can only deploy one bangboo on the field for this assessment.
Take Paperboo and
Boollseye buffs. Use the Energy
Saving Mode Chip.
Assessment Bangboo Positions:
Place Amillion, he will take care of the first wave.
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As soon as the first wave is over and you have the possibility, replace Amillion
with
Safety. He will have an easier time drilling through the tougher enemies.
Safety will manage to hold through the rest of the enemies. When the last enemy arrives,
wait until he defeats
Safety, and then launch
Rocketboo at him.
This should finish him.
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Special Assessment 02
Enemies:
- Tyrfing
- Hoplitai
- Faun
- Blastcrawler
- Vicious Striker
You can only use Penguinboo during this assessment. Use
the
Penguinboo buff and the Exam integration chip.
Assessment Bangboo Positions:
Put Penguinboo on each sides and in the middle, and then wait
and replace them as soon as they die. if you manage in between you can upgrade those
on the sides.
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Special Assessment 03
Enemies:
- Dullahan
- Dullahan
- Tyrfing
- Tyrfing
- Faun
- Blastcrawler
- Vicious Striker
Bangboos don't need assessment point to be upgraded during this stage. Use
Exploreboo and
Boollseye buffs, and the Energy-saving mode chip.
Assessment Bangboo Positions:
Place Exploreboo and
Boollseye and upgrade both directly.
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Place Butler and
Safety. Then place
Amillion
at the start, and
Plugboo.
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Place Penguinboo and
Paperboo near the exit just in case
anyone would slip through.
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Towards the end launch Rocketboo at the 3 bigger enemies.
Special Assessment 04
Enemies:
- Dullahan
- Tyrfing
- Ahriman
- Alpeca
- Hoplitai
- Blastcrawler
- Vicious Striker
You can not deploy brave Bangboos this time. Use Plugboo and
Boollseye
buffs, and the Exam Integration Chip.
Assessment Bangboo Positions:
Place Exploreboo and
Boollseye first, then
protect them with
Butler, and add
Amillion in the middle.
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Add Plugboo and another
Boollseye. Upgrade both
and the previous
Boollseye as well.
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Special Assessment 05
Enemies:
- Dullahan
- Dullahan
- Tyrfing
- Ahriman
- Vicious Striker
- Vicious Striker
Cooldown for redeployment is only 3 seconds for all Bangboo this round. Take Exploreboo
and
Paperboo for buff, and the Grill mode chip because there will
be burners this round as well.
Assessment Bangboo Positions:
Place two Exploreboo, you will need the regeneration. Place
Plugboo
on the top line first, and then
Penguinboo on the bottom line as soon as possible.
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Place another Plugboo and
Penguinboo to have the same set up on both lines.
You can upgrade the
Exploreboo if you feel like you need faster regeneration.
Be careful as the flying enemies are really fast, and don't really get stopped until
they get attacked. The Plugboos are suppose to attack them and stop them, but it can
take you a couple of tries until it works properly for this one.
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Place two Paperboo and upgrade them as soon as possible.
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When you have enough energy, replace the Exploreboo with two
Avocaboo.
When one of the
Penguinboo dies, use
Rocketboo on the same side.
Then jsut place back
Penguinboo when he dies.
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Special Assessment 06
Enemies:
- Arlaune
- Dullahan
- Tyrfing
- Ahriman
- Alpeca
- Hoplitai
- Faun
- Blastcrawler
- Vicious Striker
- Tyrfing
You can only recover Assessment Points when enemies die, and can not longer use
Exploreboo. Pick
Boollseye and
Penguinboo buffs. Use the Exam integration Chip.
Assessment Bangboo Positions:
Place Boollseye first. Wait until he kills some enemies and then
put down
Penguinboo. When possible upgrade
Boollseye
and place
Avocaboo. You can also upgrade
Penguinboo
before the vicious strikers arrive (the second wave).
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Add another Boollseye on the front line and upgrade it, as well as another
Penguinboo
with an upgrade as well. Last, place
Amillion as support on the front line.
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When you finish the Special Assessment 6 you will be able to obtain all the rewards. There is two additional optional stages that you can complete for a few dennies and 4 Bangboo System Widget. The two special stages let you use everything you learned so far. You can beat the two stages in multiple various ways so they should not pose any issue if you want to try them out.
What are the Bangboo VS Ethereal Rewards?
During the event, you can earn the following rewards:
- 560 Polychromes
- 12 W-Engine Energy Module
- 180,000 Dennies
- 16 Bangboo system widget
- 14 Specialized Freeze chip
- 16 Senior Investigator Log
- On unique collectible that can be displayed in your room
- One Namecard
Changelog
- 23 Dec. 2024: Day 4 walkthrough added.
- 22 Dec. 2024: Day 3 walkthrough added.
- 21 Dec. 2024: Day 2 walkthrough added.
- 20 Dec. 2024: Day 1 walkthrough added.
- 19 Dec. 2024: Event information added.
- 09 Dec. 2024: Guide added.
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Jay is a long time Hoyoverse player in both Genshin and Honkai Star Rail, enjoying the exploration, lore, challenges, and theorycrafting for his favorite characters. Next to creating guides, he is also an avid fan of editing videos, and you can watch him stream on Twitch
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