In addition to Spring Not Late and Gold-Class Assassin, Rita had gathered several materials over the years. After practicing a few times, her success rate for the former was 60%, while for the latter, it had risen above 90%. This had already met the standards Lucia had set for her.
She had also thoroughly studied the notes Apache had given her. Combined with her knowledge of the various fruits and plants from the Oak Owl, she even created several intermediate potions. The effects weren't groundbreaking—they were all already available on the market—but they at least proved she had genuine creative ability, rather than just being able to mimic others' formulas.
The biggest harvest, however, came from the Moon Sand.