Is Enter the Unknown legal in Standard, Modern, and Commander?

Enter the Unknown is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Enter the Unknown

Q: What type of card is Enter the Unknown?

Enter the Unknown is a Sorcery. Its oracle text reads: "Target creature you control explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on the creature, then put the card back or put it into your graveyard.) You may play an additional land this turn."

Sorcery

Target creature you control explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on the creature, then put the card back or put it into your graveyard.)

You may play an additional land this turn.

Set Rivals of Ixalan

Rarity Uncommon

Mana Value 1

Artist Howard Lyon

Collector # 128

Scryfall