Is Perplex legal in Standard, Modern, and Commander?

Perplex is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Perplex?

Perplex is an Instant. Its oracle text reads: "Counter target spell unless its controller discards their hand. Transmute {1}{U}{B} ({1}{U}{B}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)"

Perplex

Instant

Counter target spell unless its controller discards their hand.

Transmute (, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Set Ravnica: City of Guilds

Rarity Common

Mana Value 3

Artist Tsutomu Kawade

Collector # 217

Scryfall Gatherer