The last item is a living entity, and it's related to dragons.
It's not because of some clichéd story, like how the Deep Red Hundred Eye Dragon King is actually a hot-bodied red-haired Dragon lady, who got pregnant before her death and left an heir to continue her legacy...
The gender and origin of the Deep Red Hundred Eye Dragon King are both unclear, let alone how such high-level life forms reproduce, it is a mystery.
For example, one of the materials used for creating the secret food for Little Spider, the Abyssal Mantis, reproduces its offspring by devouring the barriers of smaller worlds. The methods of reproduction for higher organisms are diverse and bizarre.
If there were descendants of Dragon Kings, wouldn't it be easier for ancient Beastmasters to strengthen themselves with contracts and suppress the seals themselves?
Why should they pin their hopes on a stranger?
This living entity is a type of living weapon.
