Kraken/Octopus based champion

I was thinking of a character resembling a kraken or octopus, with perhaps the ability to autotack the same target multiple times at once or multiple targets once, and shoot a black liquid that cover the other player's screen in black goo and slows them. I know it sounds kind of... dumb, but with the right innovation I'm sure it could be done. I was thinking of it as a tank or support class (not really sure tbh). Any thoughts?