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First and foremost, we need to clarify one thing, Joan of Arc is a zombie.
A few distinct characteristics of zombies include:
Undeath, indestructibility, anathema to heaven, abhorred by mankind, adept at burrowing, a nose keener than a dog's, and undying loyalty to their master.
Some might say, isn't that just a dog?
However, the problem is that a zombie's burrowing ability isn't merely about digging a hole. As creatures destined to reside in tombs devoid of sunlight, zombies learn from birth how to create a comfortable crypt with their diligent hands. This includes designing a practical structure for the tomb, understanding the load-bearing capacity of the subterranean architecture, and ensuring the rationality of the passages and connections. It can be said that zombies are the innately gifted saints of the subterranean world, to whom even seasoned construction workers would bow and yield the right of way.