Cheapest priced copy (Modern Horizons 3): $0.35 at Card Kingdom, near mint, their price list as of .
Sage of the Unknowable 
Creature — Human Wizard · 0/4 · Common · Modern Horizons 3 · #68
{T}: Add {C}. Spend this mana only to cast a colorless spell or to activate an ability.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 3 | 68 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 7 June 2024The mana generated by Sage of the Unknowable's activated ability can be used to activate any ability, not just abilities of colorless sources.