Is Phyrexian Triniform legal in Standard, Modern, and Commander?

Phyrexian Triniform is legal in: Legacy, Vintage, Commander.

What type of card is Phyrexian Triniform?

Phyrexian Triniform is an Artifact Creature — Phyrexian Golem. Its oracle text reads: "When this creature dies, create three 3/3 colorless Phyrexian Golem artifact creature tokens. Encore {12} ({12}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)"

Phyrexian Triniform

Artifact Creature — Phyrexian Golem

When this creature dies, create three 3/3 colorless Phyrexian Golem artifact creature tokens.

Encore (, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)