Lazav, the Ass Blinker

Whenever one or more creature cards are put
into a graveyard from anywhere, you may
pay {2}. If you do, exile Lazav, the Ass Blinker, then return it to the battlefield as a copy of target creature in any graveyard, except its
name is Lazav, the Ass Blinker, it's legendary
in addition to its other types, and it has this ability.