Blood Fury

1st-level enchantment
Casting time: 1 bonus action
Range: Self
Target: --
Components: V S
Duration: 1 round
Classes: Bard, Warlock
Subclasses: --

Your senses sharpen and you enter a furious rage, gaining life from each strike you make. At the start of your next turn you gain hit points equal to half the damage you dealt the previous turn.