Underground Sea
1993 Revised Edition
Underground Sea is one of the ten original dual lands from Magic: The Gathering, producing both Island and Swamp mana without entering the battlefield tapped. The Revised Edition printing is the most commonly graded version, though it still commands premium prices in high grades due to its staple status in Legacy and Vintage formats. PSA 9 copies represent a sweet spot between affordability and condition for serious collectors.
Hold to Buy — 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