Is Marvo, Deep Operative legal in Standard, Modern, and Commander?

Marvo, Deep Operative is legal in: Legacy, Vintage, Commander.

Marvo, Deep Operative

Q: What type of card is Marvo, Deep Operative?

Marvo, Deep Operative is a Legendary Creature — Octopus Rogue. Its oracle text reads: "Whenever Marvo attacks, clash with defending player. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.) Whenever you win a clash, draw a card. Then you may cast a spell from your hand with mana value 8 or less without paying its mana cost. Power/Toughness: 1/8"

Legendary Creature — Octopus Rogue

Whenever Marvo attacks, clash with defending player. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)

Whenever you win a clash, draw a card. Then you may cast a spell from your hand with mana value 8 or less without paying its mana cost.

Power/Toughness: 1/8

Set Murders at Karlov Manor Commander

Rarity Mythic Rare

Mana Value 5

Artist John Tedrick

Collector # 7

Scryfall