Alright so i found this Background for 5e:
https://www.dandwiki.com/wiki/Plane_...e_Background):
I want to run a campaign of Plane Walkers using the Plane Shift Documents as well. the thing is, i know how to do most of this, but adding in the Inter-Planar Incident is tough.
I think its a Background Custom Ability in the Editor, but i don't know how to work it in. if anyone can help, that would be great.