Júlio Souza, Revoker of Death

When Julio Souza enters the battlefield exile
a creature card from a graveyard.
Whenever a creature you control dies, you
may pay X life, if you do, put on the battlefield
any number of target creature cards, exiled
with Julio Souza, that each have a different
converted mana cost X or less.
Sacrifice a creature: Add {b}{b}Activate this ability
only any time you could cast a sorcery.