Magic Scorpion

Dark Magic Tool: Magic Scorpion Necklace (裏魔導具『魔塊蠍の首輪』) is a magic tool used by Sally.

Description
The user attaches the necklace to their chest and presses the jewel on its back. The scorpion stabs the user with its stinger, increasing the user's magic power tenfold for ten minutes. Afterwards the necklace detaches and the user is left weakened.