[Ability Concept] One Way Terrain

So, we have a lot of terrain generation, but for the most part, it's usually walls that aren't able to crossed with the exception of Azir wall and allies.

My idea is to have a champ that ends up creating a wide ramp. When going up the ramp, it acts like normal, but when the champion has gone off the ramp, they can't go back the way they came. I was thinking that if this was used next to terrain, it would allow the person to "Jump" terrain. It would be similar to Bard's magical Journey, but would be terrain and would act like terrain for the abilities like Condemn, Naut Q, and the others.

What do you guys think? What type of champion would this ability work best on? (my guess would be support or jungler)