Walter watched his arm, fascinated. He didn't know what 'Eridium mining' was but data mining he had vaguely heard of during his student days. At the idea of it being voluntary, Walter was actually impressed and it briefly showed on his face. After all, he had 'seeparated from his flesh' to attain the power of Heaven and gain the means to awaken the Holy Mother. Being willing to give up parts of himself for new abilities or powers was something Walter respected.

"So your new arm assists with that? I'm not familiar with data mining. I studied medicine before I died."