Runespark Trap

Spell Lists: Artificer, Wizard
Abjuration cantrip
Casting Time: 1 action
Range: 10 feet
Components: V, S, M( a garnet with an abjuration rune carved into it, worth at least 15gp)
Duration: 1 minute

Invoking the rune magics of old, you scribe a glyph on the ground in a 5-foot square you can see within range. The glyph is easily visible and sheds dim light in its space. It lasts for the duration, ending early if you cast the spell again. If a creature enters the glyph's space, the glyph bursts with lightning. The color of lightning matches the color of the garnet used in the spell's casting. Creatures within 5 feet of the glyph when it bursts must succeed a Dexterity saving throw or take 1d6 lightning damage. The spell then ends.

At Higher Levels. This spells damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6) and 17th level (4d6)