Is Ethereal Investigator legal in Standard, Modern, and Commander?

Ethereal Investigator is legal in: Legacy, Vintage, Commander.

Ethereal Investigator

Q: What type of card is Ethereal Investigator?

Ethereal Investigator is a Creature — Spirit. Its oracle text reads: "Flying When this creature enters, investigate X times, where X is the number of opponents you have. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") Whenever you draw your second card each turn, create a 1/1 white Spirit creature token with flying. Power/Toughness: 2/3"

Creature — Spirit

Flying

When this creature enters, investigate X times, where X is the number of opponents you have. (To investigate, create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")