Chaos Orb

Chaos Orb enters the battlefield tapped.
{t}: Add {c}{c}. Spend this mana only to activate abilities.
Craft with four or more nonlands with activated
abilities {8}{u} ({8}{u}, Exile this artifact, Exile the
four or more from among other permanents you control
and/or cards in your graveyard: Return this card
transformed under its owner’s control. Craft only as
a sorcery.)