Is Chain of Plasma legal in Standard, Modern, and Commander?

Chain of Plasma is legal in: Legacy, Vintage, Commander.

Chain of Plasma

Q: What type of card is Chain of Plasma?

Chain of Plasma is an Instant. Its oracle text reads: "Chain of Plasma deals 3 damage to any target. Then that player or that permanent's controller may discard a card. If the player does, they may copy this spell and may choose a new target for that copy."

Instant

Chain of Plasma deals 3 damage to any target. Then that player or that permanent's controller may discard a card. If the player does, they may copy this spell and may choose a new target for that copy.

Set Onslaught

Rarity Uncommon

Mana Value 2

Artist Gary Ruddell

Collector # 193

Scryfall