POWER WORD GLORY

Level 8 enchantment

Casting Time: 1 action 
Components: V
Duration: Instantaneous
Range: 60 feet

You speak a word of power that emblazons the might of one creature you can see within range with 100 hit points or fewer. For the next minute, whenever the target takes the Attack action and hits, it regains a number of hit points equal to the damage dealt. The spell ends if the target reaches more than 100 hit points or becomes unconscious.