Strength Sap

If a creature attempts to use a move that boosts its stats, you may use your reaction to negate the increase and convert it into healing energy, recovering regain 1d10 + MOVE hit points.  This includes critical hit bonuses, AC increases, speed, attack and damage boosts, etc.

At Higher Levels: The damage dice roll for this move changes to 2d8 at level 5, 5d4 at level 10, and 4d8 at level 17.