Eldritch Bolt

You create glowing green hexagrammic rune on an object, which can be triggered in a remotely with an arcane phrase, you have an innate sense of where the mines are relative to you based on direction and intensity, but if you don't have line of sight with the rune you need another method to know when to trigger it.

When triggered eldritch lightning arcs along the walls and bolts of sickly green flame lash forward with a range of 60ft. On a hit the creature takes 5d4 necrotic damage charisma modifier, for each triggered rune. It can also be triggered immediately after casting. However triggering a rune causing it to fade and vanish.

 To place more than 1 rune you need to cast the spell again. Each can be triggered individually or simultaneously .