Is Chainweb Aracnir legal in Standard, Modern, and Commander?

Chainweb Aracnir is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Chainweb Aracnir?

Chainweb Aracnir is a Creature — Spider. Its oracle text reads: "Reach When this creature enters, it deals damage equal to its power to target creature with flying an opponent controls. Escape—{3}{G}{G}, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) This creature escapes with three +1/+1 counters on it."