Legend Story Studios will release Mastery Pack Guardian, a supplementary booster set for Flesh and Blood TCG, into retail on August 8, 2025.

The supplementary booster pack beefs up sturdy Guardian decks with 70 new cards.  This set also offers players a Classic Constructed hero, Valda, Seismic Impact, as well as an array of Marvel cold foils.  The packs also feature the Crack, Shuffle, Play! system, so players can open three packs and play a game.

The set contains 130 cards total: 3 Legendary, 16 Majestic, 30 rares, 76 commons, 3 tokens, and 12 Marvel rare. Packs come with 13 cards, and displays contain 12 packs.  Displays will retail for $54.90.

Legend Story Studios also announced Super Slam, a new Flesh & Blood TCG booster set (see "'Super Slam'").