All Diablo 4 Season 3 Companion Seneschal Governing and Tuning Stones

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Update: we now also got a look at one of the two mystery stones, Evernight! In a PC Gamer interview, Blizzard shared a screenshot of the Tuning Stone, and it is indeed the equivalent of an Ueber Unique! Shako, in fact!

Source: PC Gamer.

The Season of the Construct brings us a mechanical pet in the Seneschal, to accompany us in our new adventures. The Seneschal can be customized using Governing and Tuning stones, which we’ll be taking a look at here.

There are 12 Governing Stones and 27 Tuning Stones available in total, each with their own rarity as well, with two Governing and six Tuning being equipable at the same time. They drop from the new Vault dungeon, but also from other sources all over Sanctuary. You can also craft them at jewelers, using Shattered Stones, which drop from the Vault. You can also level the stones up by fusing two of the same ones together.

There also appear to be something akin to Uber Unique stones, with two especially powerful ones mentioned below, but with no details on what they do or how to get them.


Governing Stones:

  • Autodefense: The Seneschal Construct activates an antimaterial field around itself shooting down enemy projectiles. Can not shoot down Boss or Player projectiles.
  • Bushwhack: Quickly ambush dealing damage to each target. May strike the same target multiple times.
  • Firefly: Deploy a small construct that lands on the target and explodes 3 times, dealing damage.
  • Focus Fire: The Seneschal Construct channels a ray of fire onto targets dealing damage to each over time.
  • Gyrate: The Seneschal Construct whirls its legs around quickly dealing damage to all surrounding enemies.
  • Impale: Perform a line attack to all enemies in front of the Seneschal Construct dealing damage.
  • Lightning Bolt: Launch a bolt of Lightning at the target dealing damage. Arcs to other targets dealing a portion of the original damage.
  • Protect: The Seneschal Construct materializes a protective Barrier on the player for a portion of their Maximum Life.
  • Reconstruct: The Seneschal Construct channels a reconstruction beam Healing the player for a portion of their Maximum Life over time.
  • Slash: Pummel enemies in front of the Seneschal Construct dealing damage.
  • Tempest: Electrically charge an enemy causing it to deal damage to themselves and additional each second over time. If the enemy is killed, Tempest spreads to another enemy gaining for additional time and bonus damage. These bonuses are also applied if Tempest is reapplied onto the same enemy.

Tuning Stone Abilities:

  • Voluminous Support: The supported skill’s effect size is increased.
  • Swift Support: The supported Skill gains an Attack Speed bonus.
  • Breaking Support: Damage from the supported Skill instantly destroys enemy Barrier effects. In addition, there is a chance to make enemies Vulnerable for 2 seconds.
  • Tactical Support: Decrease the cooldown of the supported Skill.
  • Efficiency Support: When the supporting skill deals damage, you gain Critical Strike Chance to the same targets hit.
  • Devastation Support: Supported Skill gains a Critical Strike Damage bonus.
  • Safeguard Support: When used, the supported Skill grants Damage Reduction to you.
  • Frigid Support: A portion of the supported Skill’s damage dealt is applied as Cold damage over time and applies Chill.
  • Burning Support: A portion of he supported Skill’s damage is applied as Burning damage over time. Burning enemies take bonus Critical Strike Damage from the Seneschal Construct.
  • Electrocution Support: A portion of the supported skill’s damage dealt is applied as Lightning damage over time and has a chance to Stun enemies.
  • Bleeding Support: A portion of the supported skill’s damage dealt is applied as Bleeding damage over time. Enemies take bonus Bleeding damage from all sources while moving.
  • Poison Support: A portion of the supported skill’s damage dealt is applied as Poison damage over time. This poison has a chance each second to spread all Poison damage to an additional enemy.
  • Dusk Support: A portion of the supported Skill’s damage dealt is applied as Shadow damage over time. Afflicted enemies who attack have a chance for their attacks to be interrupted. Does not interrupt Bosses.
  • Duration Support: Supported Skills have their durations increased.
  • Fortify Support: When the Seneschal Construct uses the supported Skill, you gain Fortify. Skills with slower attack speeds or skills with cooldowns will increase the amount of Fortify granted.
  • Resource Support: Player gains an amount of Primary Resource when the supporting Skill first deals damage.
  • Initiative Support: The supported Skill will cause the Seneschal Construct to teleport to the target if out of range. Can only occur once every so often seconds.
  • Arcing Support: The supported Skill can hit additional enemies.
  • Multishot Support: Supported Projectile skills launch additional projectiles.
  • Piercing Support: The supported Projectile Skill will pierce multiple enemies.
  • Gripping Support: Damage and effects done by the supporting Skill to Distant enemies pulls them towards the Seneschal Construct. Can only occur once every so often per enemy.
  • Registered Damage Support: Any damage caused from the supported Skill is registered. The registered damage explodes at effectiveness when the target dies as Fire damage.
  • Seeking Support: The supported Projectile Skill will auto-seek enemies for a limited duration.
  • Slowing Support: Damage from the supported Skill Slows enemy movement speed for a limited duration. The closer the enemy is to the Seneschal Construct, the greater the Slow amount. Enemies may be slowed up to a maximum amount.
  • Mockery Support: Damage done by the supporting Skill Taunts enemies hit for a limited duration of time. This can only occur once every so often per enemy. Does not work on bosses.

Scholars have spoken in hushed whispers concerning rumors of fabled Tuning Stones, far beyond the capable power of mere mortals. Their existence is ephemeral, never confirmed by a dignified mage of high ranking. All that is known of them is writ below:

  • Evernight: ???
  • Genesis: ???