Cheapest priced copy (Dominaria United Commander): $0.79 at Card Kingdom, near mint, their price list as of .
Mana Cannons 
Enchantment · Rare · Dominaria United Commander · #83
Whenever you cast a multicolored spell, this enchantment deals X damage to any target, where X is the number of colors that spell is.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United Commander | 7 | Rare | $0.79 | — |
| Dominaria United Commander | 83 | Rare | $0.79 | — |