Is Alexios, Deimos of Kosmos legal in Standard, Modern, and Commander?

Alexios, Deimos of Kosmos is legal in: Modern, Legacy, Vintage, Commander.

Alexios, Deimos of Kosmos

Q: What type of card is Alexios, Deimos of Kosmos?

Alexios, Deimos of Kosmos is a Legendary Creature — Human Berserker. Its oracle text reads: "Trample Alexios attacks each combat if able, can't be sacrificed, and can't attack its owner. At the beginning of each player's upkeep, that player gains control of Alexios, untaps it, and puts a +1/+1 counter on it. It gains haste until end of turn."

Legendary Creature — Human Berserker

Trample

Alexios attacks each combat if able, can't be sacrificed, and can't attack its owner.

At the beginning of each player's upkeep, that player gains control of Alexios, untaps it, and puts a +1/+1 counter on it. It gains haste until end of turn.

Set Assassin's Creed

Rarity Uncommon

Mana Value 4

Artist Bartek Fedyczak

Collector # 33

Scryfall Gatherer