Static Storm

You choose 5 5-foot-square spaces within range of the spell, and they become charged with static electricity. Any creature that is in a charged area, starts its turn there, or enters it must make a Constitution saving throw. On a failure, it takes 10d10 plasma damage and becomes Incapacitated until the end of its next turn.

A creature affected by a charged area gains disadvantage on saving throws related to lightning or plasma damage for 5 rounds. If it fails a second saving throw against a charged area during that period, the creature becomes Stunned and gains vulnerability to lightning and plasma damage.

At Higher Levels. When you cast this spell by spending Mana points equal to an 8th-level spell or higher, the number of charged areas that can be placed increases by 5, and the plasma damage increases by 1d10 for each spell level above 7th.