Underground Sea from Beta is one of the most iconic and sought-after dual lands in all of Magic: The Gathering. It taps for both Blue and Black mana without entering the battlefield tapped, making it a cornerstone of Legacy and Vintage formats. Beta copies are distinguished by their rounded corners and are significantly rarer than Unlimited printings, commanding a substantial premium.
The Card Official's ruling
Strong hold or buy on dips — The most valuable dual land in Magic. Alpha and Beta copies in PSA 9 regularly trade above $10,000 — treat them as collectibles first, playables second. Revised copies are the entry point for Legacy players and represent strong long-term holds. A staple in every blue-black Legacy strategy including Grixis Delver, BUG Depths, and Reanimator. Demand is permanent — this card will never be reprinted in a tournament-legal form.
Price snapshot · PSA 10
PSA 10?The currently selected grade. Switch grades above to compare any two grades against each other.
$55,000
?The grade you want to compare against. Defaults to the lowest available grade — change it to see how any two grades compare.
$3,200
Tracked Grade Multiple?How many times more the selected grade sells vs the compare grade. A high multiple means grading could be very profitable.
17.2x
Price spread?The percentage difference between the low and high price estimate. A tight spread means consistent pricing; a wide spread means more volatility.
1619%
Grades tracked?How many different grades we have price data for on this card — raw, PSA, BGS and others. More grades means a fuller picture of market value.
9
Last priced?When our AI last updated the price estimate for this card. Prices are refreshed weekly.
