Reany's Bodyguard

Reassemble {b}{b}{b} (When this card is in your graveyard you may pay {b}{b}{b}. If you do, return this creature from the graveyard to the battlefield.)
When Reany's Bodyguard enters the battlefield, exile target creature until Reany's Bodyguard leaves the battlefield, if Reany's Bodyguard dies while it was Reassembled, that creature stays exiled.