So the metal box is used in this manner...
However, just as the Snake Vines retreated, a massive explosion erupted deeper underground, accompanied by a violent quake. Larger Snake Vines surged from the depths, not only shattering the tunnel floor but also piercing through the rock walls above. In an instant, the underground tunnel collapsed, burying the area in darkness and turning it into a death trap.
Xu Huo pulled Yan Jiayu along, using a Spatial Barrier to block the pressing rocks while grabbing hold of the ever-ascending Snake Vine—being trapped beneath the rubble is the most dangerous, regardless of whether the Snake Vine can pierce through the underground rock.
Feeling the spatial secant lines and Spatial Barrier shrinking, Yan Jiayu said, "We can't go above, follow the Snake Vine underground; there must be a larger space beneath that crevice!"
