Alright, several dozens of Soul Fires would be sufficient for an experiment. Ange channeled all of them into the skeletons, reviving sixty undead skeletons.
After studying these skeletons, Ange found that their intelligence seemed to have improved slightly. Upon careful selection, there were particularly three skeletons that showed significantly high intelligence. Ange infused farming knowledge into them, and they managed to grasp some of it.
The amount they mastered was not the key, the crucial point was whether they could put it to use. These three skeletons could carry out simple tasks like hoeing, transplanting seedlings, watering, and sowing seeds.
That was enough. Originally, the skeletons on the farm could only do these tasks. Ange acquired many abilities only later on.