Rupture

Rupture is a 1-Energy Ironclad Power that grants 1 Strength (2 upgraded) each time you lose HP from a card effect. This triggers on cards like Hemokinesis (lose 2 HP), Bloodletting (lose 3 HP), Combust (lose 1 HP per turn), and Offering (lose 6 HP). In builds centered around HP-costing cards, Rupture can rapidly generate substantial Strength as a side effect of those plays.

Rupture is a niche build-around card. Without consistent HP-costing effects, it generates little Strength. With a full suite of Hemokinesis, Bloodletting, and Combust, Rupture can produce 5-10+ Strength per combat organically. Upgraded to 2 Strength per trigger, even 3 HP-costing plays generate 6 Strength. A natural inclusion in HP-spending Ironclad decks.