Buffer

Buffer is a rare Defect Power costing 2 Energy that grants 1 Buffer, preventing the next instance of HP loss. This effect is extraordinarily powerful because it completely negates one hit regardless of how much damage it would deal, making it equally effective against small chip damage and massive boss attacks.

Buffer pairs excellently with Echo Form, which plays it twice for 2 stacks of damage prevention. Amplify also doubles the Power for 2 Buffer stacks. Creative AI can generate additional Buffers over time, and Machine Learning provides the card draw to find Buffer when you need it most.

For the Defect, Buffer is one of the best defensive rare cards available. Against bosses with massive single hits like Lagavulin Matriarch and Doormaker, a single Buffer negates their most dangerous attack. Against The Insatiable's escalating damage, Buffer buys critical extra turns. Pick Buffer in every Defect deck regardless of build, as preventing lethal damage is universally valuable.