A few low-level Cold Beasts don't pose much of a problem, with so many in the Earth-digging Realm, it's not hard to kill them.
The key is, what these Cold Beasts can break isn't just the walls of the corridor.
The wooden house of Great Xia, apart from the joints that use Iron, the rest is mostly made of wood.
With the sharp teeth and claws of these Cold Beasts, breaking through the wood is incredibly easy.
Crunch...
As if to confirm Xia Chuan's suspicions, as he rushed up the corridor, before getting close to the Frost Wolf, approaching the outer wall, noises of wood being broken from outside echoed from the compartments on both sides.
Bang...
Following immediately was the clear sound of limbs landing and stepping.
This means the Cold Beasts have broken through the outer wall and entered the second floor!
"Damn it!"