With Rod's current appeal, he could easily fill the ranks of the Black Battle Group to capacity.
But the issue is, the resources available to the battle group are fixed; the more people there are, the less each individual receives.
Without sufficient resources, not only would the growth rate of his comrades slow down, but Rod's influence on them would also decrease.
Currently, the Black Battle Group had accumulated a considerable amount of resources, but if used indiscriminately, they might not even be enough for Anna alone.
Her growth was arduous, requiring an immense amount of potions, materials, and elements.
Perhaps it was for this reason that she had been left far behind by her sisters and become known as the widely recognized "good-for-nothing".
But Rod didn't see it that way.
Aside from being an extraordinary horse, Anna's Spiritual Spear was practically a law unto itself—neglecting any factor for a guaranteed hit, with a minimum of half a second of mandatory paralysis.