Grafted Scion

As you cast this spell, sacrifice a creature.

Haste, Trample, Double Strike

This creatures power and toughness are equal to the sacrificed creatures base power and toughness. This creature has all the abilities of the sacrificed creature.
Whenever a creature dies that was dealt damage by this creature this turn, this creature gains all of that creatures abilities, put all of that creatures counters on this creature along with an additional +1/+1 counter.