Scourge of Fleets [Journey into Nyx Promos]

Type: MTG Single
Set: Journey into Nyx Promos
Type: Creature — Kraken
Rarity: Rare
Cost: {5}{U}{U}
When Scourge of Fleets enters the battlefield, 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.