Cheapest priced copy (Foundations Jumpstart): $0.49 at Card Kingdom, near mint, their price list as of .
Eidolon of Astral Winds 
Enchantment Creature — Spirit · 2/4 · Rare · Foundations Jumpstart · #2
Vigilance
Constellation — Whenever this creature or another enchantment you control enters, choose target creature you control. Until end of turn, that creature has base power and toughness 4/4 and gains flying.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 2 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 8 November 2024If Eidolon of Astral Winds enters at the same time as one or more other enchantments you control, its last ability will trigger for each of those enchantments, including itself.
- 8 November 2024The effect of Eidolon of Astral Winds's last ability will overwrite any previous effects that set the creature's power and toughness to specific values. Effects that otherwise modify the target creature's power and toughness will still apply no matter when they took effect. The same is true for +1/+1 counters.