New type of champion ability

I was thinking about the new champions and how there are theses new types of abilities coming out so i started to think of a champ myself.

i was thinking of a fisherman (special interaction with fizz and Tahm) but what could a fisherman have a net(not another cc champ) a hook (we got thresh and blitz) so what can we do than i thought how about a mix of previous abilities to change it up

I was thinking of a grab like thresh but he doesnt pull or go to him

He immobilizes the champ like a fisherman, the idea would be his ult maybe around 700 range(skillshot) if he hits someone they could only move 700 range away from the caster so they can run at the caster to try to break the hook they can run around trying to dodge abilities but they cant run farther away then 700 away from him.

he can move anywhere within the range but cant escape and to balance it out maybe the person casting it is immobile while the hook is on the enemy champ, if this was like a 6 second duration both teams will have to respond properly, I personally think this would be a cool idea for a future champ it doesn't necessarily mean a fight is about to breakout but it means you cant run away if there is :)

And maybe another way to use his ult is on allies to pull them out of the fight if they get cought out of place, im not sure just throwing ideas around

This is my first time posting an idea like this on the forum and would appreciate some feedback if u think this would be a cool concept added to league of legends