Sulva, Knighted by Dread

Flash, first strike
Whenever Sulva, Knighted by the Shadows deals combat damage, exile target card from
a graveyard. Then, if Sulva is attacking, you may
create a token that's a copy of target creature card exiled with Sulva, except it's a 3/1 nightmare.
Battles have no victors, only survivors. Fear is the sole triumphant.