Greater glyph of warding

Greater glyph of warding was an abjuration spell that created a glyph that would cause damage to those who triggered it.

Effect
This spell functioned very similarly to the less powerful glyph of warding. However, this more potent glyph caused far more damage, and the greater glyph could store a spell that was as powerful as chain lightning or lesser.

Components
The spell required somatic, verbal and material components. The latter component was diamond dust, which cost at least 400 gp.