Is Eyes of the Wisent legal in Standard, Modern, and Commander?

Eyes of the Wisent is legal in: Modern, Legacy, Vintage, Commander.

Eyes of the Wisent

Q: What type of card is Eyes of the Wisent?

Eyes of the Wisent is a Kindred Enchantment — Elemental. Its oracle text reads: "Whenever an opponent casts a blue spell during your turn, you may create a 4/4 green Elemental creature token. *Calm as a wisent's watch —Elvish expression meaning "safe"*"