Is Llanowar Greenwidow legal in Standard, Modern, and Commander?

Llanowar Greenwidow is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Llanowar Greenwidow

Q: What type of card is Llanowar Greenwidow?

Llanowar Greenwidow is a Creature — Spider. Its oracle text reads: "Reach, trample Domain — {7}{G}: Return this card from your graveyard to the battlefield tapped. It gains "If this permanent would leave the battlefield, exile it instead of putting it anywhere else." This ability costs {1} less to activate for each basic land type among lands you control. Power/Toughness: 4/3"

Creature — Spider

Reach, trample

Domain — : Return this card from your graveyard to the battlefield tapped. It gains "If this permanent would leave the battlefield, exile it instead of putting it anywhere else." This ability costs less to activate for each basic land type among lands you control.