Cornerstone Mask Ogerpon EX is a Special Illustration Rare card from the 2025 Pokémon TCG Prismatic Evolutions expansion. The full-art design by Yukihiro Tada depicts Ogerpon wearing its cornerstone mask, surrounded by a vibrant prismatic holographic background. In play, this Fighting-type Pokémon EX offers the unique “Cornerstone Stance” ability and a powerful 140-damage “Demolish” attack, showcasing both strategic potential and collectible appeal. Its striking alternate-art illustration and shimmering foil finish make this Pokémon trading card a standout addition for collectors and players alike.