Krizuloth, the Deathstalker

Flying, Deathtouch

When Krizuloth, the Deathstalker dies gain control
of target creature for as long as Krizuloth remains in
your graveyard. That creature gains "When this
creature dies or is exiled, return Krizuloth to the
battlefield under his owner's control." This ability
triggers only once per turn.