Forbidden Fusion

Wither
When you summon Forbidden Fusion from your
hand, you may choose any number of creatures
from your graveyard, and attach them to
Forbidden Fusion as Auras instead of Creatures.
Forbidden Fusion has +1/+0 for each, and adds
the colors and creature types of all attached Auras.
When Forbidden Fusion leaved the battlefield,
you may return one of Forbidden Fusion's Auras
to the top of your library.