Is Undercover Crocodelf legal in Standard, Modern, and Commander?

Undercover Crocodelf is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Undercover Crocodelf?

Undercover Crocodelf is a Creature — Elf Crocodile Detective. Its oracle text reads: "Whenever this creature deals combat damage to a player, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") Disguise {3}{G/U}{G/U} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.) Power/Toughness: 5/5"

Undercover Crocodelf

Creature — Elf Crocodile Detective

Whenever this creature deals combat damage to a player, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")