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.