Runic Cube

Runic Cube is a boss relic exclusive to the Ironclad. Whenever you take unblocked HP damage, you draw 1 card. This triggers each time damage gets through your Block and reduces your HP, turning the Ironclad's vulnerability into a draw engine. It is offered as a boss relic reward after defeating an Act boss.

Runic Cube rewards the Ironclad's aggressive, damage-dealing playstyle where taking some hits is expected. The more damage you take, the more cards you draw, which in turn lets you play more cards and deal more damage. This synergizes strongly with cards like Rupture (gaining Strength from taking HP loss), Offering (spending HP for draw and Energy), and Combust (dealing HP damage every turn). On a strong Ironclad build, Runic Cube turns combat damage into card advantage that helps you close out fights faster. It is weakest on purely defensive builds trying to take zero damage, and on builds that generate huge amounts of Block and rarely get hit. The relic pairs well with Black Blood (which heals more per combat to offset the damage taken) and with any strategy comfortable accepting some HP loss in exchange for power.