Cursed Glyph

Touch a relatively flat surface at least on an object and inscribe this glyph on it. The glyph is 1 square foot, and henceforth the surface must be the same size or smaller. Select 6 common and simple actions. Your dm will then roll a d6 to determine which action will detonate the glyph. The glyph requires a DC 15 + your spellcasting modifier investigation check to discover, at which point it can be disarmed by taking a minute to destroy it carefully without triggering it. If not detected, it will be triggered if an object or creature touches the surface upon which the glyph is inscribed while the object or creature is within detonation range. When triggered, it explodes dealing 6d8 damage to all creatures and objects in a 15 foot sphere, or half that if the target passes a DC 15 + your spellcasting modifier DEX save. Objects take half damage.

For each level of spell slot above 3rd at which this spell is cast, the explosion deals 1d8 extra damage.

If cast using a 5th level or higher spell slot, the range expands to 25ft.