Soul Stealer

Insidious - {b}{b}, Pay 6 life ({b}{b}, Pay 6 life: Exile
this card from your hand. You may cast it for as long
as it remains exiled.)
When Soul Stealer enters the battlefield, return
target creature card from a graveyard to the
battlefield under your control. If Soul Stealer
was cast from exile, return up to three target
creature cards from any graveyard to the
battlefield under your control instead.