Synergy Crystals

Inferno Core is an Epic relic that makes elemental synergies trigger twice, each time with a x1.5 bonus, effectively tripling or more the total synergy output. This is the single most powerful synergy amplifier in the game. The ultimate combo is pairing it with Elemental Compass, which also multiplies synergy values by x1.5, resulting in compounded bonuses that can deal enormous damage from even basic elemental chains.

In a focused Fire or Ice element deck, a simple two-card synergy with both relics can output damage rivaling high-cost Rare cards. Void Prism helps fuel the synergy engine by discounting the first card of each element, letting you play more element cards per turn. The relic is significantly weaker in decks that spread across many elements without committing, since synergies require consecutive same-element plays.

It has no downside, so it is never bad, but its power scales dramatically with element focus. Priority: always pick; even in loosely themed element decks, double synergy triggers provide massive value.