Is Friendly Rivalry legal in Standard, Modern, and Commander?

Friendly Rivalry is legal in: Modern, Legacy, Vintage, Commander, Historic.

Friendly Rivalry

Q: What type of card is Friendly Rivalry?

Friendly Rivalry is an Instant. Its oracle text reads: "Target creature you control and up to one other target legendary creature you control each deal damage equal to their power to target creature you don't control."

Instant

Target creature you control and up to one other target legendary creature you control each deal damage equal to their power to target creature you don't control.

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

Rarity Uncommon

Mana Value 2

Artist Marc Simonetti

Collector # 204

Scryfall Gatherer