Orcish Mutation

Place up to four +1/+1 counters on target
creature, double the number of counters
if the creature is a human. That creature
is unblockable until end of turn.
If this card was cast from the graveyard
Place up to eight +1/+1 counters on up to
three separate target creatures if those
creatures were humans double the number
of +1/+1 counters placed on them.
{4}{g}{g}{u}{u} Flashback: you may cast this card
from your graveyard and then exile it.