Underground Sea

Underground Sea: Land - Island Swamp, Summer Magic / Edgar. MTG card printings, market prices, rulings, and format legality on Mana Grove.

Mana value: 0
Type: Land - Island Swamp
Colour identity: Blue and black (UB)
Rarity: Rare
Set: Summer Magic / Edgar (SUM)
Released: 1994-06-21
Collector number: 290
Artist: Rob Alexander
Commander rank: 297 (by how often it appears in Commander decks)
Reserved List: Yes

Build around this card with Grover

About Underground Sea

Underground Sea is a Magic: The Gathering card, a rare colourless land from Summer Magic / Edgar (SUM), a core set released in June 1994. It is collector number 290 in that set, with art by Rob Alexander. As a land, it has no mana cost. Its colour identity is blue and black. It is legal in Legacy, Vintage, Old School, Commander, Duel Commander, Oathbreaker and PreDH. It has been printed in 14 sets, from Limited Edition Alpha (1993) to Vintage Masters (2014). It is on the Reserved List. The latest aggregated market price for this printing is $302.40 (normal finish, as of 2026-11-12).

Card text

({T}: Add {U} or {B}.)

Market price

Latest aggregated market price for the normal finish of this printing: $302.40 (as of 2026-11-12).

The figure covers this printing only; other printings carry their own price on their own page.

Format legality

Legality of Underground Sea by format. Formats in which it is not legal are not listed.

Legacy	Legal
Vintage	Legal
Old School	Legal
Commander	Legal
Duel Commander	Legal
Oathbreaker	Legal
PreDH	Legal

Other printings of Underground Sea

Underground Sea has been printed in 14 sets. The 12 most recent other printings are listed here, newest first, with the rarity and release year of each.

Printing	Rarity	Year
30th Anniversary Edition (30A) #281	Rare	2022
30th Anniversary Edition (30A) #578	Rare	2022
Legacy Championship (OLGC) #2016EU	Special	2016
Vintage Masters (VMA) #323	Rare	2014
Magic Online Promos (PRM) #43624	Rare	2013
Masters Edition IV (ME4) #256	Rare	2011
Masters Edition II (ME2) #240	Rare	2008
Revised Edition (3ED) #290	Rare	1994
Foreign Black Border (FBB) #290	Rare	1994
Collectors' Edition (CED) #286	Rare	1993
Intl. Collectors' Edition (CEI) #286	Rare	1993
Unlimited Edition (2ED) #286	Rare	1993

Official rulings

Two official rulings apply to Underground Sea, newest first.

2008-10-01 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.

Similar cards

Other land cards with a blue and black colour identity, ranked by how often they appear in Commander decks.

Mentioned in these guides

These guides mention Underground Sea.