Is Horn of the Mark legal in Standard, Modern, and Commander?

Horn of the Mark is legal in: Modern, Legacy, Vintage, Commander, Historic.

Horn of the Mark

Q: What type of card is Horn of the Mark?

Horn of the Mark is a Legendary Artifact. Its oracle text reads: "Whenever two or more creatures you control attack a player, look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order."

Legendary Artifact

Whenever two or more creatures you control attack a player, look at the top five cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Set The Lord of the Rings: Tales of Middle-earth

Rarity Rare

Mana Value 2

Artist Anastasia Balakchina

Collector # 241

Scryfall Gatherer