Blood Frenzy

When a creature suffering from damage-over-time is within line of sight, you can choose one of the following to gain while engaged in combat with that creature:

• You can roll an additional damage die with melee or ranged attacks (excluding spells).
• On successful hits, you regain Hit Points equal to your 1d4 + Proficiency Bonus, up to your Hit Point Maximum.

Additionally, on your turn, you can use a bonus action to change your choice of benefit above.    

These benefits are lost when the creature is no longer suffering from damage-over-time.