Stack

Stack is a common Defect skill costing 1 Energy that gains Block equal to the number of cards in your Discard Pile. In a deck that cycles rapidly through cards, Stack can generate enormous amounts of Block in a single play, often exceeding 15-20 Block in the mid to late game. The Defect's natural card draw makes this exceptionally powerful.

Stack benefits enormously from Overclock, which draws cards and fills your discard pile, and from Skim, which cycles through your deck rapidly. Machine Learning increases your hand size over time, ensuring more cards flow into the discard pile each turn. Reboot can reset your draw pile while Stack capitalizes on the previous turn's discards.

This is a strong defensive pick for Defect decks that draw many cards per turn. Against bosses like The Insatiable who deal escalating damage, Stack's scaling Block keeps pace. In fights against Doormaker, the ability to generate huge Block in one card slot is invaluable. Prioritize Stack when your deck already has strong draw engines and needs efficient defense.