Effect
When the attached card is played, the card burns and is permanently removed from the deck, granting 50 coins. This gem uniquely combines deck thinning with monetization, making it extremely useful in the late game when trimming weak early-run cards. Note that cards with the Fireproof gem cannot be destroyed by this effect.
Unlock Condition
The exact unlock condition is unknown. It is believed to be unlocked by completing a specific run or fulfilling a certain in-game condition.
Best Cards to Attach
Best placed on weak early-game cards or cards no longer needed for your combo. Attaching it to cost-0 cards like Bone allows easy removal while generating coins. This strategy slims the deck while funding future shop purchases.
Tier
Tier B — A unique gem that combines deck compression with coin generation. Increases in value during the late-game optimization phase. Be aware of interactions with the Fireproof gem.