Stormtide Leviathan's second ability causes each land on the battlefield to have the land type Island. Each land thus has the ability "{T}: Add {U}." Nothing else changes about those lands, including their names, other subtypes, other abilities, and whether they're legendary or basic.
Stormtide Leviathan's third ability affects all creatures with neither flying nor islandwalk, regardless of who controls them. They can't attack any player or planeswalker.
Islandwalk cares about lands with the land type Island, not necessarily lands named Island.
Last observed on Scryfall 2 months ago at $3.29. Over the trailing 90 days the price moved between $0.03 and $3.29 across 49 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 2 catalogued treatments from CMR — the lineup includes Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #407 of *Commander Legends*, the set that shipped alongside the November 2020 Commander Legends release.
Card type: Creature — Leviathan, color identity blue, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {5}{U}{U}{U} (8 converted). Keyword abilities: Landwalk and Islandwalk.
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #2,783 in Commander, putting it in the niche-pick tier of the format's playable pool.
Illustrated by Karl Kopinski. Rarix catalogs 804 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Karl Kopinski
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
If Stormtide Leviathan loses its abilities, all lands on the battlefield (including those that enter the battlefield later on) will still be Islands in addition to their other types and will still be able to tap to produce {U}. The way continuous effects work, Stormtide Leviathan's type-changing ability is applied before the effect that removes that ability is applied.
