Duration
Until dispelled or triggered
You inscribe a glyph on a surface. The glyph can cover an area <10' in diameter. If the object is moved >10' from where this spell is cast, the spell ends without being triggered. The glyph requires a Wis (Perception) check against your spell save DC to notice.
Set the Trigger. You decide what triggers the glyph and can set a password.
Explosive Rune. When triggered, the glyph erupts in a 20' radius Sphere. Each creature in the area makes a Dex save. Fail: 5d8 Acid, Cold, Fire, Lightning, or Thunder dmg (caster choice). Success: 1/2 the dmg.
Spell Glyph. You can store a prepared spell of lev 3 or lower, which must target 1 creature or an area. If the spell requires Concentration, it lasts the full duration. See PHB for more info.
The damage of an explosive rune increases by 1d8 for each spell slot level above 3. If you create a spell glyph, you can store any spell of up to the same level as the spell slot you use for the Glyph of Warding.
Material Component:
powdered diamond worth 200+ GP, which the spell consumes
Verbal Component:
Signum Protectio