Serana, Quenn Of Madness

Eminece — Whanever you discard a card, if is
Serana, Queen Of Madness is in the command
zone or on the battlefield, create 1/1 red
vampire creature token with, "Sacrifice this
creature, vampires you control gain +1/+0 until
end of turn".
All vampires you control have first strike.
Whanever you cast a spell with madness,
draw a card.