Is Polygoyf legal in Standard, Modern, and Commander?

Polygoyf is legal in: Legacy, Vintage, Commander.

Polygoyf

Q: What type of card is Polygoyf?

Polygoyf is a Creature — Lhurgoyf. Its oracle text reads: "Trample, myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.) Polygoyf's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1."

Creature — Lhurgoyf

Trample, myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Polygoyf's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1.

Set Modern Horizons 3 Commander

Rarity Rare

Mana Value 3

Artist Helge C. Balzer

Collector # 65

Scryfall Gatherer