The Astral Sword is a short sword with a crystal ball in its hilt. Within this ball is a small mechanical kabutomushi beetle. When the sword and all eight Astral Coins are reunited. Roboborg is summoned when the Chromium Gold Beetleborg holds the Astral Sword in the air and shouts “Roboborg!”. The Astral Sword now stays with the Beetleborgs.