This ability was introduced with the Kobolds and Catacombs' Dungeon Run mode. Passive cards ('treasures') can only be found in Duels and some Solo Adventures; however, Passive Hero Powers can also be encountered in the regular play mode and Battlegrounds.
- Passive cards are cast on the start of a Solo Adventure or Duels match, and their effect will last until the end of the game.
- Passive cards have no mana costs to help distinguish them from normal cards while viewing the deck.
- Passive cards have their effect via a specific enchantment.
- Passive Hero Powers will have their effect disabled by as usual.
- Activating a Passive Hero Power does not count as using your Hero Power and will not trigger Hero Power-related effects or Inspire.
Pool 2 Ultra Rare
Duels hero powers
Battlegrounds hero powers
Below are all current boss cards with the Passive ability.