Is Eidolon of Obstruction legal in Standard, Modern, and Commander?

Eidolon of Obstruction is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Eidolon of Obstruction

Q: What type of card is Eidolon of Obstruction?

Eidolon of Obstruction is an Enchantment Creature — Spirit. Its oracle text reads: "First strike Loyalty abilities of planeswalkers your opponents control cost {1} more to activate. *Death turned admirable conviction into pointless intransigence.* Power/Toughness: 2/1"