Is Lyev Skyknight legal in Standard, Modern, and Commander?

Lyev Skyknight is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Lyev Skyknight

Q: What type of card is Lyev Skyknight?

Lyev Skyknight is a Creature — Human Knight. Its oracle text reads: "FlyingWhen Lyev Skyknight enters, detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)"

Creature — Human Knight

Flying<br>When Lyev Skyknight enters, detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)

Set Pioneer Masters

Rarity Common

Artist Johannes Voss