Jalan, Graveyard Walker

During your turn if any creatures are in the graveyard you may pay{b}{b}{b}{b} and return all creatures in you graveyard to the battlefield.
f Jalan, Graveyard Walker is in the graveyard you may pay {2}{b}{b} and return from the graveyard to the battlefield, at your end step exile Jalan, Graveyard walker
{t} Sacrifice Jalan, Graveyard Walker, Destroy all permanents