Flame Barrier

Flame Barrier is a 2-Energy Ironclad skill that grants 12 Block and retaliates for 4 damage whenever you're attacked this turn (16 Block and 6 damage upgraded). The retaliation mechanic is passive and automatic — against multi-hit enemies or groups that attack multiple times, the damage quickly adds up. Against a Sentries group that hits 3 times in one turn, Flame Barrier deals 12 counter-damage in addition to the 12 Block.

Flame Barrier is particularly effective against multi-attack enemies where the retaliation chips away at them naturally. It's less efficient against slow single-hit enemies. Upgraded at 16 Block and 6 retaliation, it becomes one of the better 2-Energy defensive cards available. A solid uncommon for defensive Ironclad builds that face frequent multi-hit encounters.