Cheapest priced copy (Aetherdrift): $0.49 at Card Kingdom, near mint, their price list as of .
Boommobile 
Artifact — Vehicle · 5/5 · Rare · Aetherdrift · #310
When this Vehicle enters, add four mana of any one color. Spend this mana only to activate abilities.
Exhaust — {X}{2}{R}: This Vehicle deals X damage to any target. Put a +1/+1 counter on this Vehicle. (Activate each exhaust ability only once.)
Crew 2
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
6 printings · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Aetherdrift | 113 | Rare | $0.49 | $0.49 |
| Aetherdrift | 310 | Rare | $0.49 | $0.49 |
| Aetherdrift | 454 | Rare | — | $0.99 |
| Aetherdrift | 526 | Rare | — | $2.99 |
| Aetherdrift Promos | 113p | Rare | $0.49 | $0.49 |
| Aetherdrift Promos | 113s | Rare | — | $0.69 |
4 rulings from Wizards of the Coast
- 7 February 2025Exhaust abilities can be activated any time you could normally activate an ability.
- 7 February 2025You may spend the four mana added by the first ability on the same ability or on multiple abilities.
- 7 February 2025If an exhaust ability of a permanent is activated, and then that permanent leaves the battlefield and returns to the battlefield, it becomes a new object so its exhaust ability can be activated again.
- 7 February 2025If an ability triggers whenever you activate an exhaust ability, that ability resolves before the exhaust ability resolves.