Cheapest priced copy (Final Fantasy Commander): $1.79 at Card Kingdom, near mint, their price list as of .
Colossus Hammer 
Artifact — Equipment · Uncommon · Final Fantasy Commander · #338
Equipped creature gets +10/+10 and loses flying.
Equip {8} ({8}: Attach to target creature you control. Equip only as a sorcery.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
7 printings · $1.79 to $27.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 202 | Uncommon | $2.49 | — |
| Final Fantasy Commander | 338 | Uncommon | $1.79 | $3.99 |
| Game Night: Free-for-All | 115 | Uncommon | $2.99 | — |
| The Lost Caverns of Ixalan Commander | 110 | Uncommon | $8.99 | $24.99 |
| Core Set 2020 | 223 | Uncommon | $2.49 | $9.99 |
| Secret Lair Drop (Shovel of Decapitation) | 736 | Rare | $19.99Out of stock | $27.99 |
| Secret Lair Drop (Gaia's Dark Hammer) | 1866 | Rare | $13.99 | $11.99 |
3 rulings from Wizards of the Coast
- 12 July 2019Colossus Hammer can be attached to a creature that didn't have flying to begin with. It just won't lose flying.
- 12 July 2019If the equipped creature gains flying after Colossus Hammer became attached to it, it will keep flying.
- 12 July 2019If an ability of the equipped creature states that it has flying "as long as" a particular condition is true, that condition becoming true will not cause that creature to gain flying. For example, if the equipped creature "has flying as long as it's attacking," it will not gain flying, even if it attacks after Colossus Hammer becomes attached to it.