Donation of Health

You cause yourself to bleed, for example cutting your palm with a knife or pricking your finger with a pin, and then utter the magic words and donate your own life force as healing to a creature you then lay your hands on. You take 1d4 unavoidable slashing or peircing damage, and can spend one plus an additional hit die per level of this spell. You then roll for healing equal to the number and size of die spent this way.