The boon, the connection was a temporary one, though as she watched the thrashing male, she smiled. He would have to earn the power, to make it permanent, to integrate it inside of himself. After all, nothing was free, and the price must always be paid. Power was hardly any exception.
Smiling at her disciple, the Roserka seemed to be pleased, looking over his form, licking her lips, though she would not indulge, not yet exactly. "My bidding is simple enough my pet. In the days of yore, the Roserka were the spirits of the wilds, as were the fey. when the Tanar'ri rose up in rebellion, they cast us down, even as usurpers took the thrones of the faerie realms. We shall drag them down screaming." She giggles, her voice light and amused.
"But! There is a... complication." She sounds annoyed, even as a hand strokes his hair, like a noble woman and her hunting hound. "When they rose, they consumed our lands, took it for their own, and have barred the return. Thus, a source of power, the sacrifices, require that I remain close. This is.... annoying." And really, it was. Worse even however, was that if she was banished or slain, she would be forced to return to the abyss, right into the hands of her kinds foes. Not to mention, that unless she was close by to harvest the offerings personally, well, they would land somewhere in the abyss, where in times gone by her people harvested them, her mark on the souls.
"So my pet, my hunting hound, I require two things of you at the moment. Firstly, you must grow strong enough that when my blessing fades, you shall remain strong, and have the power of the wilds continue to howl in your veins. Secondly, you must seek out the outsiders, the oppressed and those that are looked down on. For I intend to create a haven, but for that, I need more, to chant, to devote themselves." And of course, to do the grunt work. Most of the cult she intended to gather would be anything more than fodder, and a means of gaining strength, something to be able to create that which would keep her power secure for the moment.
And in time, allow her to build it to much, much greater heights.