Is Shadow Slice legal in Standard, Modern, and Commander?

Shadow Slice is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper.

Shadow Slice

Q: What type of card is Shadow Slice?

Shadow Slice is a Sorcery. Its oracle text reads: "Target opponent loses 3 life. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)"

Sorcery

Target opponent loses 3 life.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Set Gatecrash

Rarity Common

Mana Value 5

Artist Raymond Swanland

Collector # 77

Scryfall Gatherer