Cheapest priced copy (Zendikar Rising): $0.35 at Card Kingdom, near mint, their price list as of .
Sneaking Guide 
Creature — Goblin Rogue · 1/1 · Common · Zendikar Rising · #164
{2}, {T}: Target creature with power 2 or less can't be blocked this turn.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Zendikar Rising | 164 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 25 September 2020Once a creature with power 2 or less has been blocked, Sneaking Guide’s ability won’t cause it to become unblocked.
- 25 September 2020If the target creature’s power is greater than 2 as Sneaking Guide’s ability tries to resolve, the ability doesn’t resolve. However, if instead the creature’s power is raised above 2 after the ability resolves, it still can’t be blocked that turn.