Demon Tongue

Demon Tongue is a relic that underpins Ironclad's self-damage builds from the ground up. The first HP payment each turn is cancelled, so powerful HP-cost cards like Hemokinesis and Offering effectively lose their downside.

Important: only the "first" HP payment per turn is covered. If you play multiple HP-cost cards in a single turn, the second and subsequent ones still cost HP as usual. That makes it key to spread HP-cost cards across turns at one-per-turn pacing. Still, being able to safely play Offering every turn dramatically boosts both deck cycle and output.

Even without a dedicated self-damage build, it works as insurance for cards like Flame Barrier and Brand that lose HP in combat. However, it goes dead in decks with few self-damage pieces, so pick priority depends heavily on deck direction.