Dexterity
Dexterity is a buff that increases the amount of Block gained from every card that grants Block by an amount equal to its stacks. For example, 3 Dexterity means every Block-granting card provides 3 additional Block per play. Like Strength for attacks, Dexterity makes defensive cards substantially more efficient, and its value scales with how many Block cards are played per turn.
Dexterity is particularly important for defensive builds and is found on cards like Entrench and Footwork (for The Silent). Certain relics like Ginger and Turnip prevent Weak and Frail respectively, which protects your attack and block output. Enemies like Lagavulin will drain your Dexterity, making it a vulnerability to watch for. Negative Dexterity (from effects like After Image or enemy debuffs) reduces Block gained from cards below their base value.