Is Loathsome Troll legal in Standard, Modern, and Commander?

Loathsome Troll is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Loathsome Troll

Q: What type of card is Loathsome Troll?

Loathsome Troll is a Creature — Troll. Its oracle text reads: "{3}{G}: Roll a d20. Activate only if this card is in your graveyard. 1—9 | Put this card on top of your library. 10—19 | Return this card to your hand. 20 | Return this card to the battlefield tapped."