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

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

Charnel Troll

Q: What type of card is Charnel Troll?

Charnel Troll is a Creature — Troll. Its oracle text reads: "Trample At the beginning of your upkeep, exile a creature card from your graveyard. If you do, put a +1/+1 counter on this creature. Otherwise, sacrifice it. {B}{G}, Discard a creature card: Put a +1/+1 counter on this creature."