Spirit Hosts generally had only one spirit, because the way they grew stronger was simply too outrageous. It was not that no divine spirit had considered giving a Spirit Host several spirits, but powerful as divine spirits were, they lacked the wizards' talent for research.
Multiple spirits in one body would only cause a Spirit Host's power to swell without limit, until the whole person burst like a balloon!
Even wizards had taken a long time to solve this problem. Although a solution now existed, they faced one enormous obstacle: even the finest cook could not make a meal without ingredients...
According to the Mad Witches' frenzied experiments in earlier years, multiple spirits in one body generally occurred under only two circumstances. One depended entirely on luck. If you were fortunate, it happened, with no pattern whatsoever and no way to control it.
The other could be controlled, but it was hardly good news.
That was because this kind of multiple-spirit configuration was usually the result of severe interference from an Outer God's power. Simply put, these Spirit Hosts were created entirely from an Outer God's hidden contingencies...
The Spirit Host before Isaac, for example, belonged to the latter category. Amid a great many hidden contingencies left by an Evil God, he had discovered a small quantity of pure Evil God power...
No wonder that wizard had not come to collect this Spirit Host with multiple spirits.
He was a failed product.
Generally speaking, Mad Witches of the familiar school dealt with Outer God power through equal division: splitting it evenly into hundreds of portions of the smallest possible unit. That way, no matter how many hidden contingencies the Outer God planted, even a First Tier Formal Wizard could identify them.
After all, a grain of sand thrown into a