Currupting potion needs removed

You're in luck there is not item called Curruption Potion in the game.... [sg-ezreal]

Corrupting Potion is needed to deal with range discrepancies in the midlane and lane bullies in the top lane. I do admit it's very strong though.

Corrupting potion and the runes and items associated with it have already nerfed twice now.

Not really much of an issue anymore.

Corrupting Potion only has 3 charges before the user has to recall to refill them. It also doesn't entirely prevent burst damage, so if you can burst them down fast enough you can either kill them, push them back to the tower or force them into an early recall, the latter of which would allow you to push/freeze the wave and get a better recall and/or roam to help out other lanes. Finally if your champ has grievous wounds then you can also use that to help lower the amount of healing the opponent receives from the potion uses. I'll also quote was GatekeeperTDS said in your now deleted PB thread:

If you can figure out how to deal with someone who has an infinity edge, for example, I know you can figure out how to deal with a corrupting potion. This is one of those things that stops people from improving at the game - refusal to think outside the box. Are you building the same thing on Rekenton every match no matter what? You have to adjust your build for the current game, not just use the recommended items.