Charon, Styx's Watcher

Whenever a creature you control dies, create a 1/1 Spirit creature token with Flying and draw a card.
{1}{b}{b}, sacrifice a creature: Destroy target
creature.
{5}{b}{b}: Return Charon, Styx's Watcher from
your graveyard to the battlefield.
Any life can't pass the Styx , they have to be
dead. Charon resolve this problem.