This multicolored, thumb-sized opal is carved with a variety of arcane symbols.

A glyph seal allows you to convert any arcane or divine spell of up to 2nd level into a symbol similar to a glyph of warding.
To do so, you must cast the spell while holding the seal; doing this is called keying the seal. You can safely transport a keyed glyph seal until you activate it by pressing the seal to the desired surface.
The seal can adhere to any nonmagical, nonliving object. An activated glyph seal functions as the spell glyph function of a glyph of warding and can be detected and disabled as a magic trap (DC 30).
A glyph seal is unaffected by the spell within it. Once activated, the now-empty glyph seal can be retrieved (though it requires a successful DC 30 Search check to find) and used. You can always remove any glyph seal you keyed and activated to redeploy it elsewhere.

Prerequisites: Craft Wondrous Item, glyph of warding.
Cost to Create: 500 gp, 40 XP, 1 day.