Hexblade’s Curse

Choose one creature you can see within 30 feet
to curse for 1 minute or the target dies, you die,
or you are incapacitated. Until the curse ends,
you gain the following benefits:
•You gain proficiency bonus to damage rolls
against the cursed target
•Attack rolls against the cursed target are critical
on a roll of 19 or 20
•If the cursed target dies, heal your warlock level
+ your Charisma modifier