[Exactly. If you want this formation to stop, you have to do that after you get far away from this Island. The best-case scenario is to be out of the Central Area altogether.]
Naturally, Rean understood what the issue was. 'I can set up a formation that will destroy the runes of this one after a certain time. However, we would need to leave this place, and the Archangel would definitely come inside and stop it. We only have a few minutes, according to Jeskli, so I can't set up anything complicated.'