Kaza, Roil Chaser 
Legendary Creature — Human Wizard
Flying, haste
: The next instant or sorcery spell you cast this turn costs 
less to cast, where X is the number of Wizards you control as this ability resolves.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL