![Underground Sea (30th Anniversary Edition #578) Underground Sea (30th Anniversary Edition #578)](https://cards.scryfall.io/large/front/2/8/28dee88a-8961-4bf7-8eb2-3d9ae2dab5de.jpg?1664929551)
![30th Anniversary Edition Back 30th Anniversary Edition Back](https://backs.scryfall.io/large/0/4/049a6229-ace9-4363-816a-60cb8773e95d.jpg?1665006325)
Underground Sea
Land — Island Swamp
({T}: Add {U} or {B}.)
Illustrated by Rob Alexander
Part of the Reserved List
Not Legal This version of this card has a non-standard Magic back. It is not legal for constructed play.
Toolbox
Buy This Card
Notes and Rules Information for Underground Sea:
- This has the mana abilities associated with both of its basic land types. (2008-10-01)
- This has basic land types, but it isn't a basic land. Things that affect basic lands don't affect it. Things that affect basic land types do. (2008-10-01)