Curse Of Lightning

When someone is cursed by this spell, anytime someone has to make a Dex check or saving throw, the player makes a charisma check, the creature must roll a charisma saving throw that beats the charisma check,  if they fail the save the enemy takes 4d10 lighting damage but if they succeed the save they take only 2d10 lighting damage. When used in a 5th level or higher spellslot it increase the damage that the enemy takes by 1d10 damage per level spellslot, When it is used in a 9th level spell slot it will also stun the target for 1d4 turns.