He slightly rose again to look downwards: "But later, they probably realized that randomly cutting here and there wasn't effective, so they focused on cutting one spot, which is where those three alien invaders are currently cutting."
Beneath the crystal, about one-fifth of the section was missing, representing the wear from a millennium of alien invasion. Right now, those three alien invaders are repeatedly cutting that area.
"Oh, I see," Wen Guixin slightly raised his eyebrows, "If we cut at these gaps they've already started, it would save us effort and the crystal's appearance wouldn't change much, making it less noticeable."
"That's exactly what I mean," Xu Xin nodded, "Moreover, although those pits aren't very deep, cutting within them can block some of the laser light."
