Hextech Gatekeeper Item Idea

How about an item that costs the same amount (or a little more) as Ohmwrecker that turns enemy base gates into friendly gates for 2-3 seconds? To prevent collision bugs, the gate could remain open to players on the gate's team, but if any of you coders out there don't feel like it would bug out, then the gate could definitely just flip polarities and keep its allies from passing through it as well.

The cooldown on the item would have to be quite a lengthy one. I'm thinking about 180 seconds? Now the only question remains: what would the other item's other passive stats be? A purely defensive item like Ohmwrecker? Movement speed buff? This is where community collaboration would be lovely.

This would add a new level of concern for people trying to hide behind that wall. Someone could effectively flash over, kill whomever they wanted to kill, then use the Hextech Gatekeeper instead of awkwardly getting a teammate to tank a tier 3 turret for them as they exit the base (ex. if they're an immobile champ like Alistar, Vel'Koz, Jhin, etc.).

It doesn't even have to be a Hextech item, but I'm assuming that the shields that protect those gates are of Hextech manufacturing? They seem to be into shield-y sorts of things (as Poppy might say).

Feel free to discuss! :)

EDIT: I forgot a poll, but since Riot doesn't have an official suggestion forum, I guess it's fine? :/