Archimonde Boss Guide for Book of Heroes (Jaina)

Archimonde uses a Demon Warlock deck with additional tools like Expired Merchant, Demonwrath, and Dark Skies. The boss also has access to the Rain of Chaos Hero Power in the fight.

You will be provided with a powerful Mage deck full of spells with a small number of minions like Arcane Giant and Cosmic Anomaly to support them. You will additionally have access to the Summon Elemental Rank 2 Hero Power.

Once you get the boss below 10 Health Thrall and Tyrande will appear to finish off the boss.

In your mulligan you should look for early-game removal tools ike Ray of Frost, Frostbolt, and Flame Ward to deal with the early minions played by the boss.

For the first 3 turns of the fight, you should use your removal tools liberally to remove any early demons played by the boss. From Turn 4 onward, you should try to use your Summon Elemental Rank 2 every turn as a consistent source of 4/7 minions to help control the board further. As the boss's removal tools can not deal with 4/7 minions at will, it will quickly run out of cards.

Although the boss has access to the extremely powerful Rain of Chaos Hero Power, it will almost never use it and will priorise playing cards instead. This will allow you get ahead and eventually grind down the boss through the use of your own Hero Power.