Ekans from the Sv2a 151 set is a Master Ball Reverse Holo rarity card, numbered #023 in the Korean variant. Currently valued at $0.00, it holds a unique position in the Pokémon trading card market, appealing to collectors of the set. Its design reflects the distinctive style of the Sv2a series, while the Reverse Holo finish adds an eye-catching element, though it may not have significant market demand at this time.