Only just started using this forum so I'm not sure if something like this has been posted before.
The lightning tower will have a troop on top, not sure what (maybe a new troop?), which will cast a rage of lightning from the sky, it will be not be splash damage as it would be too similar to the wizard tower, but will do a high amount of damage to troops, it will mainly target high damage taking troops such as giants and golems but takes time to recharge. This tower can deal huge amounts of damage but has a long re-charge time, and has a low amount of hit points, also this tower can't be harmed by lightning spells, it will be unlocked at TH 9/10. Let me know who you think