Twilight Masquerade arrived in 2024 as a pivotal set celebrating the Pokémon Scarlet and Violet era, specifically focusing on the Terastallization mechanic and the Pecharunt storyline. The set marked an important inflection point for the TCG, blending competitive playability with stunning artwork that elevated the visual standard of modern releases. Its releases sparked renewed collector interest across multiple demographics. Cornerstone Mask Ogerpon ex represents one of the set's marquee cards, featuring the Poison Mask variant of this legendary Pokémon. Collectors pursue this card for its striking artwork and integral role in both competitive formats and the lore surrounding Ogerpon's mystical origins. The ex designation and unique Terastallized presentation make it a centerpiece for collectors building comprehensive Scarlet and Violet collections.