Any teaching that talks about holding the local ground or losing the local ground is totally out in the weeds. Who decides on these rules, anyway?
It's all a bunch of mumbo jumbo nonsense. "You had the local ground, but now you lost the local ground." "But wait, I have it back, because of this... or that... which I just made up!"
It's like they are playing Dungeons and Dragons...
Player 1: "I hold the Supreme Wizard card, therefore your teleportation powers are neutralized!"
Player 2: "Ho, ho! But I have the Flying Pig card, which disempowers your Supreme Wizard card! Therefore I can teleport!"
Player 1: "But no! Because the Flying Pig stopping the Supreme Wizard requires that you also hold the double bonus card, which you don't have!"
Player 2: "But I do have a time travel card, which allows me one free time reset--which I will now use to reverse my playing my double bonus card three turns ago. So I will still have it! Hah!"
And on and on, ad vomitus.
Wake up, people!