You searched for blood sacrifice
1. blood sacrifice
Syntax: cast 'blood sacrifice'
By cutting into your palm and sacrificing the blood to your ancestors, they
share their power with you, boosting your magicroll. Upon casting the
spell, you lose a portion of your hitpoints and your maximum hitpoints will
be lowered for the duration of the spell. The amount of hitpoints lost
decreases and the amount of magicroll gained increases as you become more
proficient in casting this spell.
Self‑cast only.