create death knight

the caster must touch a corpse and spill some of his blood on it when this is done the corpse will grow in size (or shrink) to become a death knight this death knight works like any undead minion and stays with the caster until it hit points reach 0 or it is dispelled by its maker

for every death knight the caster has at the same time she must lose 20 max hp (the caster can die from this)