一撃マスター is a Pokémon expansion with set code ja-s5i. The Trademeup catalog tracks 93 cards from this set. Release date: Jan 22, 2021. Singles from this set currently range from €0.04 to €239.19. The most expensive card tracked right now is バンギラスV at €239.19. Expansions released around the same time: 連撃マスター and sF: Single Strike & Rapid Strike Premium Trainer Boxes.
