Is Thelonite Hermit legal in Standard, Modern, and Commander?

Thelonite Hermit is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Thelonite Hermit?

Thelonite Hermit is a Creature — Elf Shaman. Its oracle text reads: "All Saprolings get +1/+1. Morph {3}{G}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, create four 1/1 green Saproling creature tokens."