Biorot ooze

{b}{g}: Exile target creature with Biorot ooze. At
the beginning of your next upkeep, put the
exiled card into its owners graveyard and put a
+1/+1 counter on Biorot ooze. Use this ability
only any time you could cast a sorcery and only
once each turn.
When Biorot ooze leaves the battlefield, return
all cards exiled with Biorot ooze to the battlefield
under their owner's control.