Simon, Krat Mastermind

Hexproof

Whenever a creature card is put into an opponent's graveyard, 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.

"You speak the truth as you see it... just like everyone else."