Is Lost Monarch of Ifnir legal in Standard, Modern, and Commander?

Lost Monarch of Ifnir is legal in: Legacy, Vintage, Commander.

Lost Monarch of Ifnir

Q: What type of card is Lost Monarch of Ifnir?

Lost Monarch of Ifnir is a Creature — Zombie Noble. Its oracle text reads: "Afflict 3 (Whenever this creature becomes blocked, defending player loses 3 life.) Other Zombies you control have afflict 3. At the beginning of your second main phase, if a player was dealt combat damage by a Zombie this turn, mill three cards, then you may return a creature card from your graveyard to your hand."

Creature — Zombie Noble

Afflict 3 (Whenever this creature becomes blocked, defending player loses 3 life.)

Other Zombies you control have afflict 3.

At the beginning of your second main phase, if a player was dealt combat damage by a Zombie this turn, mill three cards, then you may return a creature card from your graveyard to your hand.

Set Aetherdrift Commander

Rarity Rare

Mana Value 4

Artist Piotr Dura

Collector # 11

Scryfall Gatherer