Cheapest priced copy (The Lost Caverns of Ixalan): $0.35 at Card Kingdom, near mint, their price list as of .
Thousand Moons Infantry 
Creature — Human Soldier · 2/4 · Common · The Lost Caverns of Ixalan · #38
Untap this creature during each other player's untap step.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Lost Caverns of Ixalan | 38 | Common | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 10 November 2023Thousand Moons Infantry untaps at the same time as the active player's permanents. You can't choose not to untap it at that time.
- 10 November 2023Thousand Moons Infantry still untaps during your untap step as normal.
- 10 November 2023If an effect states that Thousand Moons Infantry doesn't untap during your untap step, that effect won't apply during another player's untap step.