You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells you cast.
""Willem put it on and started shooting sparks from his hands like some kind of wizard! Was supposed to be my turn next, but the blasted thing won't come off his hand. Send help."
—Brazen Coalition expedition dispatch"
Format Legality
Standard Not_legal
Pioneer Not_legal
Modern Legal
Legacy Legal
Vintage Legal
Commander Legal
Pauper Not_legal