Is Ureni, the Song Unending legal in Standard, Modern, and Commander?

Ureni, the Song Unending is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Ureni, the Song Unending

Q: What type of card is Ureni, the Song Unending?

Ureni, the Song Unending is a Legendary Creature — Spirit Dragon. Its oracle text reads: "Flying, protection from white and from black When Ureni enters, it deals X damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control, where X is the number of lands you control. Power/Toughness: 10/10"

Legendary Creature — Spirit Dragon

Flying, protection from white and from black

When Ureni enters, it deals X damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control, where X is the number of lands you control.

Power/Toughness: 10/10

Set Tarkir: Dragonstorm

Rarity Mythic Rare

Mana Value 8

Artist Alexander Ostrowski

Collector # 233

Scryfall