Is Foul Emissary legal in Standard, Modern, and Commander?

Foul Emissary is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Foul Emissary

Q: What type of card is Foul Emissary?

Foul Emissary is a Creature — Human Horror. Its oracle text reads: "When this creature enters, look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order. When you sacrifice this creature while casting a spell with emerge, create a 3/2 colorless Eldrazi Horror creature token. Power/Toughness: 1/1"

Creature — Human Horror

When this creature enters, look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

When you sacrifice this creature while casting a spell with emerge, create a 3/2 colorless Eldrazi Horror creature token.

Power/Toughness: 1/1

Set Eldritch Moon

Rarity Uncommon

Mana Value 3

Artist Dan Murayama Scott

Collector # 158

Scryfall