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({T}: Add {U} or {B}.)
Abilities, attacks, weakness & resistance
Other cards from Masters Edition IV
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Underground Sea (ME4-256) is a nonbasic Land with the Island and Swamp subtypes from Masters Edition IV. It can be tapped to add either blue or black mana, giving flexible fixing for two-color decks. Its basic land types mean it counts as both an Island and a Swamp for effects that care about land types, though it is not a basic land itself.
Catalog pricing data as of 30 Apr 2026, 14:46
