Subordination lightning

You were one with lightning, which left an indelible mark on your body. Past experience and the consequences you have experienced give you the ability to use lightning in battle.

• Increase your Constitution score by 1, to a maximum of 20.
• You have a pool of charges equal to the value of your primary ability stat.
• Every short rest you can restore the number of charges. Concentrated blast has charges equal to Proficiency Bonus + CON mod. A long rest restores all charges.
• Once per round when you hit with a melee attack, you can spend two charge to channel enhance into the strike, dealing an additional 1d6 damage of the Lightning. This additional damage increases to 2d6 at 6th level, 3d6 at 11th level, and 4d6 at 16th level.
• You can use the action and spend 7 charges to stored electricity to release a large burst of voltage around you (15ft), all creatures within range must make dexterity saving throws. On a fail, the target takes 3d10 damage and is paralyzed for 1 minute. Targets that successfully save take half damage and are not paralyzed. The damage of this use increases by 3d10 when you reach 5th level (6d10), 11th level (9d10), and 17th level (12d10).
  Immediately after using an range discharge, you must succeed in saving DC 15 Constitution saving throw or suffer one level of exhaustion.

If you reach 0 charges, you will be paralyzed for 1 minute. When paralyzed, you can make a constitution saving throw vs your own spell dc at the end of every turn.