Is War Horn legal in Standard, Modern, and Commander?

War Horn is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

What type of card is War Horn?

War Horn is an Artifact. Its oracle text reads: "Attacking creatures you control get +1/+0."

Artifact

Attacking creatures you control get +1/+0.

Set Magic Origins

Rarity Uncommon

Mana Value 3

Artist Lars Grant-West

Collector # 243

Scryfall Gatherer

Artifact Modern Pioneer Commander

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