Can we have an almost permanent wall being created by any mean ?

I'd like a to see a way to created almost permanent wall in the game , we have champions that creates long lasting bushes, champion that creates long lasting minions, champion creating long lasting turret.

how it comes we don't have any champion that create long lasting walls ? (i'n not talking about being trapped , you can always address that issue with a long enough cast time)

i'd like to see a champion that create a safe area for drakes , stops enemy ganks, block certain jungle path maybe bock his own minions to throw them to the opponent's turret's after 2 minutes or so