It would be a skill shot summoner spell that would prevent an enemy champion for casting spells and using summoners depending on the range at which it hit. If it hits at max range it would stop them from casting spells and summoners for 2 seconds. At any other range, it lasts for only 1 second. 280 second cooldown
So it's basically a silence?
This seems way too strong just in concept. Against some champions, a silence can completely destroy them, while no other summoner spell has the same potential. A bit more damage, some survivability, a chance for a gank, a gap-closer or a potential escape, that's what some of the rest of the summoner spells do. This would have the potential to completely stop a champion's engage, remove their escape or just remove a lot of damage. Even if it's just for a short while, it can be horrible to champions like Veigar or Katarina. Most AP carries would die to this. Just think of an Azir trying to do the Shurima Shuffle into ulti, but a summoner anyone can have stops him from ulting, basically just placing him inside the enemy team, ready to die.
I know you tried to balance it with making it a skill shot, but that would just make the summoner spell unreliable. Most other summoner spells have some effect, even if you don't use it to its full potential. Only Barrier and Cleanse have the potential do do literally nothing and that's only when you misclick or completely misread the situation. This summoner spell would put everyone who uses it with the potential to fail every use of it, not because you used it at the wrong time or the wrong target, but because you missed by just 50 range. I don't think this should be an actual summoner spell.
