Cheapest priced copy (Scars of Mirrodin): $0.49 at Card Kingdom, near mint, their price list as of .
Ratchet Bomb 
Artifact · Rare · Magic 2014 · #215
{T}: Put a charge counter on this artifact.
{T}, Sacrifice this artifact: Destroy each nonland permanent with mana value equal to the number of charge counters on this artifact.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 284 | Rare | $0.99 | $2.99 |
| Magic 2014 | 215 | Rare | $0.59 | $2.49 |
| Magic 2014 Promos | 215★ | Rare | — | $0.99 |
| Scars of Mirrodin | 196 | Rare | $0.49 | $4.99 |
2 rulings from Wizards of the Coast
- 7 August 2020If a permanent has {X} in its mana cost, X is considered to be 0.
- 7 August 2020Tokens that aren't a copy of something else don't have a mana cost. Anything without a mana cost normally has a mana value of 0.