Assurance

You strike a creature where it already hurts. Make a melee attack against a creature, dealing 1d10 + MOVE dark damage on a hit. If the target has already taken damage in the same round, double the damage dice.

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.