Mirror of Bonds

Mirror of Bonds is a Rare relic that doubles the first Power effect each time it triggers, effectively making all your powers 50-100% more effective. Since Powers provide persistent effects throughout combat, doubling their triggers creates enormous compounding value. A damage-scaling power now scales twice as fast; a draw power draws double.

The strongest synergy is with Demon Queen's Crown, which lets you have six powers instead of three. Six doubled powers create an overwhelming board state that few enemies can compete with. Any strong Power card in the game becomes exceptional with this relic.

It is also great with Witch's Cauldron, since the exhaust-and-draw effect triggers twice, clearing more status cards and drawing more replacements. The relic has no downside, but it does require you to actually play Power cards to function. In decks with zero or few powers, it sits idle.

Priority: always pick if you have even one good Power card; the value scales dramatically with each additional power you add.