Is Embodiment of Agonies legal in Standard, Modern, and Commander?

Embodiment of Agonies is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Embodiment of Agonies

Q: What type of card is Embodiment of Agonies?

Embodiment of Agonies is a Creature — Demon. Its oracle text reads: "Flying, deathtouch This creature enters with a +1/+1 counter on it for each different mana cost among nonland cards in your graveyard. (For example, {2}{B} and {1}{B}{B} are different mana costs.)"

Creature — Demon

$0.31 ↗20 similarCommander, Modern

Flying, deathtouch

This creature enters with a +1/+1 counter on it for each different mana cost among nonland cards in your graveyard. (For example, and are different mana costs.)