Is Brilliant Ultimatum legal in Standard, Modern, and Commander?

Brilliant Ultimatum is legal in: Modern, Legacy, Vintage, Commander.

Brilliant Ultimatum

Q: What type of card is Brilliant Ultimatum?

Brilliant Ultimatum is a Sorcery. Its oracle text reads: "Exile the top five cards of your library. An opponent separates those cards into two piles. You may play lands and cast spells from one of those piles. If you cast a spell this way, you cast it without paying its mana cost."

Sorcery

Exile the top five cards of your library. An opponent separates those cards into two piles. You may play lands and cast spells from one of those piles. If you cast a spell this way, you cast it without paying its mana cost.

Set Shards of Alara

Rarity Rare

Mana Value 7

Artist Anthony Francisco

Collector # 159

Scryfall Gatherer