Lazav and Niv Mizzet

Flash, Flying
Whenever you cast a spell, draw a card and each opponent mills a card
Whenever you draw a card, Lazav and Niv
Mizzet deals 3 damage to any target
If a creature card would go into an opponent's graveyard from anywhere, exile it. If you do, the
next time you cast a spell this turn, it becomes a
copy of that creature