Weak

Weak is a debuff that causes the affected target to deal 25% less damage with Attacks. It lasts for a number of turns equal to its stack count, decreasing by 1 at the start of each turn. Weak stacks can be extended by applying additional stacks, and multiple sources of Weak simply add to the total duration rather than stacking multiplicatively.

Weak is one of the most efficient forms of mitigation in the game, effectively functioning as a 25% damage reduction. The Silent excels at applying Weak, with cards like Neutralize (starting card), Crippling Cloud, and Malaise. The Weak potion is available to all characters. When fighting high-damage enemies, pre-applying Weak before their large attacks is a core survival technique. Enemies can also inflict Weak on the player — Green Louses apply it via Spit Web.