About the first question, my understanding is that both cards means any 2 wall sections. Unfortunelly the game suffers a bit on some translations on a few cards...
Possession works like this. When you use it, you put the tokens on the hero orders, if the defender use a hero order with the true token (remember that 2 tokens are fake, and one is true) they must remove that hero order from the game. Also remember at the end of every round the tokens from rituals are returned to the invader. And yeah, if the defender lose a hero order this way he can not get it back.
Thank you, I had thought that was a translation problem. I'll play it that way going forward unless anyone has evidence to contradict.
I keep forgetting that rituals come with 3 tokens. So this would only be useful if the hero saves his orders until the end of the round. It would also mean that if you get them once, the subsequent uses of Possession would get easier, with the last one being automatic?