Is Eumidian Wastewaker legal in Standard, Modern, and Commander?

Eumidian Wastewaker is legal in: Legacy, Vintage, Commander.

What type of card is Eumidian Wastewaker?

Eumidian Wastewaker is a Creature — Insect Cleric. Its oracle text reads: "Whenever this creature attacks, you and defending player each discard a card or sacrifice a permanent. You draw a card for each land card put into a graveyard this way. Encore {6}{B}{B} ({6}{B}{B}, 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.)"

Eumidian Wastewaker

Creature — Insect Cleric

Whenever this creature attacks, you and defending player each discard a card or sacrifice a permanent. You draw a card for each land card put into a graveyard this way.

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.)