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• Type: Attack
• Cost: 0
• Effect: Can only be played if there are no cards in your draw pile. Deal 50 damage to ALL enemies.

Upgraded

• Cost: 0
• Effect: Can only be played if there are no cards in your draw pile. Deal 60 damage to ALL enemies.

A conditional Attack playable only with an empty draw pile, but dealing 50-60 AoE damage when it fires. If you can thin the deck enough to empty the draw pile quickly, you can potentially play it almost every turn. Cost 0 lets you use all your Energy elsewhere. The classic plan is to pack the deck with Exhaust cards to thin it aggressively. Upgraded 60 damage kills many bosses in 1-2 hits. A well-built Grand Finale deck is nearly unstoppable.

• Thin the deck as much as possible. Use Exhaust cards (Adrenaline, Cheat, Backstab) to shrink it and empty the draw pile more often.
• Pack cost-0 cards (Slice, Prepared) to play them all in one turn, emptying the draw pile before firing Grand Finale.
• Foresight can Retain Grand Finale, guaranteeing it's ready the moment the draw pile is empty.
• With Exhaust decks, the draw pile empties every turn and Grand Finale can fire consecutively.
• A one-shot finisher rather than multi-hit or poison — fast clear against tough foes.

• Adrenaline: Energy + 2 draws + Exhaust. Exhaust thins the deck to meet Grand Finale's condition.
• Foresight: Retain a card at turn end. Retain Grand Finale for guaranteed activation the moment the pile empties.
• Well-Laid Plans: Same "fewer cards = stronger" concept. Use both after burning through your hand.
• Cheat: Discard hand, draw same number, Exhaust. Exhaust helps thin the deck.

• Act 1 early: Low. Thick early deck makes it hard to empty the draw pile.
• Act 1 late: Medium. Consider if Exhaust/deck compression is progressing.
• Act 2+: High (if thinning is done). A thin deck enables every-turn activation.
• Boss reward: Deck-dependent. Risks being a dead card outside a dedicated build.