Cheapest priced copy (Commander Legends): $0.35 at Card Kingdom, near mint, their price list as of .
Ordeal of Nylea 
Enchantment — Aura · Uncommon · Foundations · #641
Enchant creature
Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice this Aura.
When you sacrifice this Aura, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
5 printings · $0.35 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends | 247 | Uncommon | $0.35 | $0.49 |
| Foundations | 641 | Uncommon | $0.35 | — |
| Jumpstart 2022 | 699 | Uncommon | $0.35 | — |
| Neon Dynasty Commander | 123 | Uncommon | $0.35 | — |
| Theros | 170 | Uncommon | $0.35 | $2.99 |
2 rulings from Wizards of the Coast
- 8 November 2024The check of whether the enchanted creature has three or more +1/+1 counters on it happens as part of the resolution of the attack triggered ability. If the third +1/+1 counter is put on the enchanted creature any other way, you won't sacrifice Ordeal of Nylea until the next time the creature attacks.
- 8 November 2024Ordeal of Nylea's last ability will trigger when you sacrifice it for any reason, not just when you sacrifice it because of the effect of its second ability.