Cheapest priced copy (Innistrad Remastered): $0.35 at Card Kingdom, near mint, their price list as of .
Geistcatcher's Rig 
Artifact Creature — Construct · 4/5 · Uncommon · Innistrad · #223
When this creature enters, you may have it deal 4 damage to target creature with flying.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad Remastered | 264 | Uncommon | $0.35 | $0.49 |
| Innistrad | 223 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 22 September 2011The target creature with flying is chosen when the ability triggers and goes on the stack. You choose whether or not Geistcatcher’s Rig will deal 4 damage to it when then ability resolves.