Is Generous Ent legal in Standard, Modern, and Commander?

Generous Ent is legal in: Modern, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Generous Ent?

Generous Ent is a Creature — Treefolk. Its oracle text reads: "Reach When this creature enters, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.") Forestcycling {1} ({1}, Discard this card: Search your library for a Forest card, reveal it, put it into your hand, then shuffle.)"