name: Underground Sea
originalText: ocT: Add either {B} or {U} to your mana pool.
  Counts as both swamp and islands and is affected by spells that affect either. If a spell destroys one of these land types, this card is destroyed; if a spell alters one of these land types, the other land type is unaffected.
printings: 2ED, 30A, 3ED, CED, CEI, FBB, LEA, LEB, ME2, ME4, OLGC, PRM, SUM, VMA
text: ({T}: Add {U} or {B}.)
type: Land — Island Swamp