Is Case of the Pilfered Proof legal in Standard, Modern, and Commander?

Case of the Pilfered Proof is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Case of the Pilfered Proof

Q: What type of card is Case of the Pilfered Proof?

Case of the Pilfered Proof is an Enchantment — Case. Its oracle text reads: "Whenever a Detective you control enters or is turned face up, put a +1/+1 counter on it. To solve — You control three or more Detectives. (If unsolved, solve at the beginning of your end step.) Solved — If one or more tokens would be created under your control, those tokens plus a Clue token are created instead. (It's an artifact with "{2}, Sacrifice this token: Draw a card.")"

Enchantment — Case

Whenever a Detective you control enters or is turned face up, put a +1/+1 counter on it.

To solve — You control three or more Detectives. (If unsolved, solve at the beginning of your end step.)

Solved — If one or more tokens would be created under your control, those tokens plus a Clue token are created instead. (It's an artifact with ", Sacrifice this token: Draw a card.")