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This creature can't attack unless defending player controls an Island. When you control no Islands, sacrifice this creature.
Abilities, attacks, weakness & resistance
Other cards from 30th Anniversary Edition
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Sea Serpent (30A-373) is a common blue Creature — Serpent from the 30th Anniversary Edition. It costs {5}{U} and is a 5/5 that can’t attack unless an opponent controls an Island, and must be sacrificed if you control no Islands. Its build role is as a sizable blue body with deck-building constraints tied to opponents’ or your own Islands.
Catalog pricing data as of 22 Apr 2026, 19:05