Is Arahbo, Roar of the World legal in Standard, Modern, and Commander?

Arahbo, Roar of the World is legal in: Legacy, Vintage, Commander.

Arahbo, Roar of the World

Q: What type of card is Arahbo, Roar of the World?

Arahbo, Roar of the World is a Legendary Creature — Cat Avatar. Its oracle text reads: "Eminence — At the beginning of combat on your turn, if Arahbo is in the command zone or on the battlefield, another target Cat you control gets +3/+3 until end of turn. Whenever another Cat you control attacks, you may pay {1}{G}{W}. If you do, it gains trample and gets +X/+X until end of turn, where X is its power."

Legendary Creature — Cat Avatar

Eminence — At the beginning of combat on your turn, if Arahbo is in the command zone or on the battlefield, another target Cat you control gets +3/+3 until end of turn.

Whenever another Cat you control attacks, you may pay . If you do, it gains trample and gets +X/+X until end of turn, where X is its power.