Is Yorion, Sky Nomad legal in Standard, Modern, and Commander?

Yorion, Sky Nomad is legal in: Pioneer, Legacy, Vintage, Commander, Historic. It is banned in: Modern.

Yorion, Sky Nomad

Q: What type of card is Yorion, Sky Nomad?

Yorion, Sky Nomad is a Legendary Creature — Bird Serpent. Its oracle text reads: "Companion — Your starting deck contains at least twenty cards more than the minimum deck size. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.) Flying When Yorion enters, exile any number of other nonland permanents you own and control. Return those cards to the battlefield at the beginning of the next end step."

Legendary Creature — Bird Serpent

Companion — Your starting deck contains at least twenty cards more than the minimum deck size. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)

Flying

When Yorion enters, exile any number of other nonland permanents you own and control. Return those cards to the battlefield at the beginning of the next end step.

Set Ikoria: Lair of Behemoths

Rarity Rare

Mana Value 5

Artist Steven Belledin

Collector # 232

Scryfall Gatherer