Is Odious Trow legal in Standard, Modern, and Commander?

Odious Trow is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Odious Trow

Q: What type of card is Odious Trow?

Odious Trow is a Creature — Troll. Its oracle text reads: "{1}{B/G}: Regenerate this creature. *Trows are the vile trolls that lurk in the bogs of Shadowmoor. They reappear each night to frighten the living and gnaw the dead.* Power/Toughness: 1/1"