Electromagnetic Pulse

When you cast this spell, you send a powerful burst of energy that ruins electronic circuitry in a 20-foot cube. Any computer, telephone, television, or other device with a computer processor inside ceases to function immediately, and the contents of hard drives and other storage media are scrambled. The electromagnetic pulse affects only devices with extensive circuitry, not everything that uses electricity. Ordinarily the lights stay on, although their electronic switches might not function. Automobiles continue to run, although their engines will run more roughly without electronic guidance. Cars with an electronic ignition system won't start after the spell. Devices affected by this spell can be fixed using an engineering kit.