Is Greenbelt Guardian legal in Standard, Modern, and Commander?

Greenbelt Guardian is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Greenbelt Guardian?

Greenbelt Guardian is a Creature — Elf Ranger. Its oracle text reads: "{G}: Target creature gains trample until end of turn. Exhaust — {3}{G}: Put three +1/+1 counters on this creature. (Activate each exhaust ability only once.) Power/Toughness: 2/2"