Underground Sea


Format Legality
Tiny Leaders Legal
Noble Legal
Leviathan Legal
Magic Duels Legal
Canadian Highlander Legal
Vintage Legal
MTGO Legal
Vanguard Legal
Legacy Legal
Archenemy Legal
Planechase Legal
1v1 Commander Legal
Duel Commander Legal
Unformat Legal
Casual Legal
Commander / EDH Legal

Printings View all

Set Rarity
Vintage Masters (VMA) Rare
Masters Edition IV (ME4) Rare
Masters Edition II (ME2) Rare
Revised Edition (3ED) Rare
Revised Foreign Black Border (3EDFBB) Rare
Unlimited Edition (2ED) Rare
Collector's Edition (CED) Rare
International Collector's Edition (CEI) Rare
Limited Edition Beta (LEB) Rare
Limited Edition Alpha (LEA) Rare

Combos Browse all

Underground Sea

Land — Island Swamp

(: Add or to your mana pool.)

Set Price Alerts

Have (1) Azdranax
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Underground Sea Discussion

KillDatBUG on H: updated binder. W: a ...

3 days ago

main things im looking for

i'll also look at binders

my binder

dingusdingo on Flex

4 days ago

It is true that there are infinite "what ifs" in a game as open as Magic, but we know that there are certain cards we can expect to see in the most competitive formats. If we look at what is currently being run and why its effective, we can better prepare our decks to be more resilient against them.

Your deck tries to combo out by ramping mana, drawing cards, and playing into a win-con. There are going to be certain styles of decks that are more prone to shutting you off, which is why I'm bringing up these strategies in particular. Since your combo window is turns 4-6, you need to be worried about two things in cEDH. The first is people comboing out faster than you. We see this in decks such as Gitrog, Godo Helm, or even Grenzo. When these decks are consistently busting their combo turn 2-3, you need to answer or lose. Relying on other players to put a stop to a win attempt will prove unreliable, which is why its so important that you slot removal. Your turn 4/5/6 answer does no good when the game is over by turn 2/3. If you have no way to turn off their win, you are asking them to goldfish to a victory on you.

The second type of decks that will prove problematic for a turn 4-6 combo deck is stax, because their deck is designed to deprive you of resources and push your combo window so far back that you are unable to combo before they have won. They drop very fast and efficient heavy mana rocks, and then put down tax effects to make you unable to play. This specific style of deck can be hard for your build because they can lock you out of playing your draw spells, they can steal your draws, or simply prevent your draws altogether.

Let me give an example to show you what I mean.

Stax Example Show

Stax is a very common archetype in the competitive scene, which is why its so important that you try to stax-proof your deck. It looks to me as if stax can cause serious problems for you.

On top of taxing stax, there's another type that may shut your deck off. Heavy discard. An early Sire Of Insanity can hose your whole game, while Mindslicer can impact your card advantage enough to cause a loss. Multiple discard effects like Necrogen Mists Bottomless Pit Oppression landing by turn 2 will make your build extremely sad (Turn 1 Dark Ritual Cabal Ritual Mana Crypt + any producing land and drop two discard enchantments). Chains of Mephistopheles turns off all your big draws, so does Alms Collector or Notion Thief

Another set of cards I would recommend taking a peek at is recursion. It can help against discard effects that would otherwise shut you off, or serve as a 2nd/3rd/4th copy of your draw spell. Wildest Dreams would work surprisingly well in your deck, the mana aspect is negligible and lets you reuse multiple big draw spells from your graveyard, as well as recover from wipes. Nostalgic Dreams is arguably worse with the additional cost, but can translate extra basics tutored by your 3 cmc ramp spells into more draws. Regrowth is also fantastic.

I hope you don't mind the close inspection! I really enjoy your build, I'm just curious to know if you run into these cards and how you interact with them. Almost all the stax cards I linked are included in tournament proven cEDH lists with various commanders, so they're cards that are in the meta and will be played.

cdkime on Does this Count as Annoying?

1 month ago

The Scarab God might be a good inclusion for this deck, as it provides repeatable graveyard recursion.

I would certaintly move Fraying Sanity from your maybeboard to the deck itself.

I do not think Secret Salvage is a great card for you. While you can fetch all your petitioners to your hand, you still need the ability to cast them. After you spend five mana on a tutor, that's going to be pretty difficult. Instead, consider running Fabricate . It can fetch your Thrumming Stone , your Mindcrank , your Helm of Obedience , or even a mana rock if needed.

Arcane Sanctum is a bad land, and does not belong in any mana base also containing Underground Sea . Consider replacing it with Cavern of Souls to make your Petitioners uncounterable.

goblinguiderevealpls on Razin' minds, takin' names (competitive nekusar)

1 month ago

hey all sorry for late replies, lifes been busy and my Underground Sea was stolen so i haven't worked on the deck in several months.


nekusar is more of a storm deck than a stax deck when tuned, however more countermagic could be run, i just cant find room for it, but things like Spell Snare , Delay , Stifle , Countersquall are on my watch list as i have copies, Entomb is mainly for eldrazi shuffles but it can be used to entomb targets for Mission Briefing and Yawgmoth's Will

i have a Dack Fayden but i took it out as i only get 1 activation before he dies, and its usually the +1 as the artifact steal is highly situational. i agree on Bitter Ordeal as i have one too and its been in maybeboard for a while

chains and puzzle box are actually the "stax" in the deck, as when combined it negates draws and nukes hands, thereby negating the opponent draw enabling that comes innately with wheels

kozilek is mainly anti-mill so i dont deck myself with wheels or get milled out by opponents, and confidant can be painful yes but on average its great card advantage on turn 1 or 2

Phyrexian Arena is pretty good, i would run it but things like Necropotence are far more efficient.


i added ad naus in my most recent update as a "win on cast" card as its designed to be, but you're right that it can hurt a bit too much, id have to replace it with another pseudo wincon, maybe Laboratory Maniac ?

thanks for the input

cdkime on B&R announcement tomorrow

1 month ago

Out of curiosity, I did a quick search of MTG top 8 to see what reserve list cards were being played. In the top 50 cards, the following reserve list cards appear: Volcanic Island , Underground Sea , City of Traitors , Bayou , Tundra , Mox Diamond , and Badlands . If you limit this search to non-land cards, Mox Diamond and Lion's Eye Diamond are the only two reserve list cards to make the top 50.

Those are all great cards, but their representation does not seem high enough to say "the reserve list is killing legacy." It may play a small role by increasing the cost of some cards, but it is far from the format's biggest problem.

I think competition from Modern (both in terms of players and in terms of demand for cards being used in both formats driving up price), Wizards not providing support for Legacy, and the rarity with which new cards that shake up Legacy are printed, are all bigger threats to the format than the Reserve List.

rockleemyhero on H: Mox Opal W: Savannah

2 months ago

Hey folks I got a NM Mox Opal for trade and looking for a Savannah . Also interested in a Badlands or Underground Sea (can add other value like Lion's Eye Diamond for the sea.

Dango on Aminatou Staxshifter (Esper Stax Primer)

3 months ago

DanTheBear hush my sweet child. The pricetag is a figure of the most idealistic flashy deck on paper possible. A result of SynergyBuild's work he put into intentionally expensifying the deck as much as he possibly could. We'll be working on a budget version soon, and if you'd like we can provide a price estimate for a non-foil version of the list with lower value printings. Also keep in mind the price from there can be lowered by cutting cards like Chains of Mephistopheles, Scrubland, Tundra, and Underground Sea. Hell, $8K of this deck is coming from the alpha edition Underground Sea alone haha.

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Underground Sea occurrence in decks from the last year


All decks: 1.33%

Commander / EDH:

All decks: 0.05%

W/U/B (Esper): 0.65%

U/B/R (Grixis): 0.56%