It’s actually a gate made of sparkling glass that blinds us before we even get a chance to step inside. The rest of the wall looks to be made of the same thing, but I can’t believe the Silver king would be stupid enough to hide behind glass walls. “It isn’t glass,” Gisa tells me. “Or at least, not entirely. The Silvers discovered a way to heat diamond and mix it with other materials. It’s totally impregnable. Not even a bomb could get through that.” Diamond walls.