Is Scourge of Fleets legal in Standard, Modern, and Commander?

Scourge of Fleets is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Scourge of Fleets

Q: What type of card is Scourge of Fleets?

Scourge of Fleets is a Creature — Kraken. Its oracle text reads: "When this creature enters, return each creature your opponents control with toughness X or less to its owner's hand, where X is the number of Islands you control."

Creature — Kraken

When this creature enters, return each creature your opponents control with toughness X or less to its owner's hand, where X is the number of Islands you control.

Set Commander Legends

Rarity Rare

Mana Value 7

Artist Steven Belledin

Collector # 403

Scryfall Gatherer