Jacob asks Esau why he's with the people, then. Esau says they're a means to an end. "I'm leaving, Jacob. I've found a way off the island." Jacob says that's impossible; there is no way off. In answer, Esau throws the Dogen dagger across the way. It doesn't land on the ground. Instead, it sticks to the stone wall surrounding the well Esau and his people have been digging. Jacob goes to examine it. He reaches for the dagger, but pulls his hands away when he feels it vibrating. After deciding they're good vibrations, he grabs the dagger again, and pulls it off the well wall. The humming stops.
Esau approaches his confused brother. "There are very smart men among us -- men who are curious about how things work. Together we have discovered places all over this island where metal behaves strangely. When we find one of these sites, we dig. And this time we found something." Jacob's all huh, so Esau speaks plainly. "Come with me, Jacob. Please. What are you gonna do when she dies?" Jacob says she will never die. Esau: "Jacob, everything dies." Jacob doesn't care. He doesn't want to leave Craphole; it's his home. Esau: "Well, it's not mine."