Moonsilver Archer

Mutate {3}{u} (If you cast this spell for its mutate
cost, put it over or under target non-Human
creature you own. They mutate into the creature
on top plus all abilities from under it.)
Whenever this creature mutates it gains "Each
upkeep choose target creature. When that
creature attacks this turn, create a treasure
token."
{2}{u}: Scry 1.