Cheapest priced copy (Shadows over Innistrad): $0.35 at Card Kingdom, near mint, their price list as of .
Ethereal Guidance 
Sorcery · Common · Shadows over Innistrad · #18
Creatures you control get +2/+1 until end of turn.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Shadows over Innistrad | 18 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 8 April 2016The set of creatures affected by Ethereal Guidance is determined as the spell resolves. Creatures you begin to control later in the turn won’t get +2/+1.