Sage of the Unknowable 
Creature — Human Wizard
: Add 
. Spend this mana only to cast a colorless spell or to activate an ability.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Creature — Human Wizard
: Add . Spend this mana only to cast a colorless spell or to activate an ability.