Blood of Osiris

The blood of Osiris flows through your veins. Having mastered the forbidden necromantic magic of the Hollowborn, you have been deemed worthy to drink the blood of the Elder of Hollows. With this new transfusion, your physical flesh has been reshaped and reformed by the divine power within its ichor. Feeding upon the pain and suffering you experience, the Blood of Osiris allows you to enter a kind of ghoulish frenzy as the rhythm of combat seizes you.

Whenever you take damage, you may choose to activate one of the following abilities based on the total damage taken throughout the combat. These effects last until the end of initiative

The following effects may only trigger once per turn. These abilities cannot be activated while unconscious.

Dark Infusion (25): Your attacks may apply your hemocraft die an extra two times to your damage. This effect stacks up to three times.
Hollow Reprisal (40): You mark a creature within 60 feet of you with the Blood of Osiris. Until the end of your next turn, that creature loses hitpoints equal to two rolls of your hemocraft die whenever it deals damage, casts spells, or uses abilities.

The following effects may trigger only once per round. These abilities cannot be activated while unconscious.
Undying Warrior (50): You gain the effects of Death Ward
Pain Frenzy (75): You gain the effects of Haste

The following effects may be triggered only once per long rest and may be activated while unconscious.

Undying Regeneration (100): You gain the effects of Regenerate
Hollow Resistance (200): You may cleanse two effects or conditions from yourself.
Resurgence of Osiris (300+ or Instant Death): After the damage is taken, you gain the effects of Power Word: Heal