Plan B

Find the ruins of an ancient June portal on the coast, try awakening them with your Adventurer's Stone and report the results to Clement de Ardeur.

Oh, the comms are down... Whatever will we do? Think, my dear brain, think...
Bingo! I got an idea! Clement, a scientist from House de Ardeur, mentioned something about stone ruins not far from the camp. He said they looked like a portal and have been there since the June era. However, it was non-functional when we checked it. We'd kick and rub it, and the elf would cast all kinds of spells - it just wouldn't work. But we didn't have an Adventurer's Stone, which you do! All Stones are linked to portals, we know that for sure. What if your Stone can awaken the portal?
Trying costs nothing, after all. Go see Clement and try doing something about that goddamned portal. What exactly? How should I know?! Bang your head against it or strike it with your Stone!
Get creative! Actually, that's not a bad idea. No, not the one about the head! I'm talking about the Stone. Perhaps contacting the magic slumbering inside the ruins can awaken them, eh? That would be great!

Goddamned portal... I've never felt so absolutely helpless!

How?! How did you manage it?!
I've been racking my brains trying to awaken those ruins, but nothing would come out of it... And now, they nearly came back to life! Though I wouldn't risk binding a Stone to them. You can easily miss while being teleported and end up being fused into the allod's center...