Is Ordeal of Purphoros legal in Standard, Modern, and Commander?

Ordeal of Purphoros is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Ordeal of Purphoros

Q: What type of card is Ordeal of Purphoros?

Ordeal of Purphoros is an Enchantment — Aura. Its oracle text reads: "Enchant creatureWhenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Purphoros.When you sacrifice Ordeal of Purphoros, it deals 3 damage to any target."

Enchantment — Aura

Enchant creature<br>Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Purphoros.<br>When you sacrifice Ordeal of Purphoros, it deals 3 damage to any target.

Set Pioneer Masters

Rarity Uncommon

Artist Maciej Kuciara