Prerequisite: Spellcasting or Pact Magic Feature, 4th level
Whenever you cast a ritual spell that requires a material component,
you can instead use blood, draining the living vital essence of
creatures to power the magic in a unique way.
Willing living creatures within 10 feet (including you) can expend
hit points as part of casting the spell, with each 10 hit points
sacrificed in this manner able to replace up to 100 gp of material
components (for example, to replace a diamond worth 500 gold, 50 hit
points would have to be expended in this manner).
Any creature that contributes a number o hit points greater than
their character level (or CR if they have no level) to this ritual gains 1
level of exhaustion. (Kibbles Blood Magic)
