"Moreover, the hero units in the Slave Beast army are also worth cultivating, as they are top-level Pet Beasts that others can only dream of."
The only thing that really caught his attention was the Undying Rabbit, a special abnormal species truly named Particle Rabbit, which Serena Martin summoned from history. But since Mousie evolved and acquired the ability of High-Speed Regeneration, his desire wasn't as strong.
There was an overlap in functions!
If he had the chance to extract it as a material, he could make it into a skill and give birth to the ability of Blood Drop Rebirth.
Compared to that, he favored logistic-class Pet Beasts more!
"Soul System Materials are quite rare, though we do have a batch. However, for ones above this level, the Borderland branch here only has one. If we check with a few nearby Great Domains, we should be able to transfer another one."