Serena, Final Lover

Channel {p/c}{p/w}{w/b}{p/b} — Create 4 1/1 black Snake
creature tokens with deathtouch.
Ward — {p/c}, Exile 2 cards from your hand.
Menace, infect (Deals damage to creatures as -1/-1 counters and to players as poison counters.)
Whenever 1 or more creatures block this, are
blocked by this, or fight with this, choose 1 from
them and destroy it.