Disarm

Disarm is a 1-Energy Ironclad skill that permanently reduces an enemy's Strength by 2 (3 upgraded) for the rest of combat, then Exhausts. Strength reduction is multiplicative with hit counts — removing 2 Strength from an enemy that attacks 3 times per turn reduces their damage output by 6 per turn indefinitely. Against Strength-heavy enemies like Sentries, the Gremlin Nob, or the Champ, Disarm can significantly reduce incoming damage.

Because it Exhausts, Disarm is a one-per-combat tool, but the permanent damage reduction often pays for itself within 2-3 turns. It's especially strong when an enemy's Strength would threaten to overwhelm your Block. Upgraded to 3 Strength removed, the defensive value is even higher. A reliable utility card for the Ironclad in encounters where enemy Strength scaling is a concern.