Duality Stone

Crystal of Duality is an Epic relic that provides excellent value in balanced decks mixing attacks and defense. Every card you play pulls double duty: attacks generate block passively, and block cards chip away at enemies. This creates a baseline of efficiency where even weak cards contribute both offensively and defensively.

It shines brightest in decks with many cheap cards, since each card played triggers the bonus regardless of its base values. Multi-hit attacks are particularly strong here, as each individual attack card grants the block bonus. The relic also works well with Eternal Grip, since retained cards played across multiple turns keep generating dual value.

Star Map further amplifies the effect on leveled-up cards. The relic is weaker in highly specialized all-attack or all-block decks, where one half of the effect triggers rarely. It also loses relative value in decks with few card plays per turn.

Priority: always pick in balanced builds; situational in hyper-focused archetypes.