Boon of the Lich

When Boon of the Lich enters the battlefield,
you lose 5 life.
Spells you cast have Gravestorm. (When
you cast a spell with gravestorm, copy it for each
permanent put into your graveyard from the
battlefield this turn. If that spell was an instant,
sorcery, or aura, you may choose new targets
for the copy.