Expel Glass (material)

Expel Glass
Type	Offensive Magical Item
Fields	Diable, Summon, Transform
Cost	5 rupees

Expel Glass is not actually glass, contrary to its name, but is a semitransparent metallic material which a Weaponsmith can imbue into any weapon he or she is otherwise able to craft.  The resulting weapon gains a unique properly.  Whenever a Summoned being is struck by the weapon, that being is abruptly expelled back to wherever it came.  Similarly, any being who is struck while Transformed out of their original form--such as someone wearing a Transformation Mask, or a Stallion Statuette--will be abruptly forced back into its original form.  In either case, the creature is prevented from being summoned, or from transforming into its struck form, for at least a minute.  Notably, any Major treasures, and some boss monsters may be too powerful to affect with Expel Glass.

The Expel Glass (material) treasure is an original creation by one of Hyrule Castle's members. Its concept is credited to Guy.