You can store any harmful hex you know (but not a major hex or a grand hex). All level-dependent features of the spell are based on your caster level at the time of casting the glyph. If the spell has a target, it targets the intruder. If the spell has an area or an amorphous effect, the area or effect is centered on the intruder. If the spell summons creatures, they appear as close as possible to the intruder and attack. Saving throws and spell resistance operate as normal, except that the DC is based on the level of the hex stored in the glyph.

You trace the glyph with incense, which must first be sprinkled with powdered diamond.

Read magic allows its caster to identify a greater hex glyph with a successful DC 16 Knowledge (arcana) check. Identifying the glyph does not discharge it and indicates that it stores a hex, but does not indicate the effect of that hex.