Cheapest priced copy (The List): $0.69 at Card Kingdom, near mint, their price list as of .
Boompile 
Artifact · Rare · Commander Masters · #371
{T}: Flip a coin. If you win the flip, destroy all nonland permanents.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.69 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 52 | Rare | $0.79 | — |
| Commander Masters | 371 | Rare | $0.79 | $2.49 |
| Commander Masters | 600 | Rare | — | — |
| The List | C16-52 | Rare | $0.69 | — |
2 rulings from Wizards of the Coast
- 8 November 2016If you win the flip, Boompile is destroyed along with all the other nonland permanents.
- 8 November 2016You flip a coin as Boompile’s ability resolves. No player may take actions between seeing the result of the flip and all nonland permanents being destroyed.