Is Scion of Darkness legal in Standard, Modern, and Commander?

Scion of Darkness is legal in: Legacy, Vintage, Commander, Historic.

Scion of Darkness

Q: What type of card is Scion of Darkness?

Scion of Darkness is a Creature — Avatar. Its oracle text reads: "Trample Whenever this creature deals combat damage to a player, you may put target creature card from that player's graveyard onto the battlefield under your control. Cycling {3} ({3}, Discard this card: Draw a card.)"

Creature — Avatar

Trample

Whenever this creature deals combat damage to a player, you may put target creature card from that player's graveyard onto the battlefield under your control.

Cycling (, Discard this card: Draw a card.)