Lazav, Dimir Mastermind

Hexproof, Afterlife 5.
Whenever a creature card is put into an
opponent's graveyard from anywhere,
you may have Lazav, Dimir Mastermind
become a copy of that card, except its
name is Lazav, Dimir Mastermind, it's
legendary in addition to its other types,
and it has hexproof and this ability.