There is only one recipe: go to places where there are monsters and look at the bottom of the location, where the treasures available at the location are indicated. And get these treasures using the method of Celica's main work.
Okay, so, I can't craft it then. I have to explore for it. That's good to know. And I have one more question. Is there a way to reduce lag on android? What settings do I need to adjust? Because for some reason, the animations always seem to be laggy, making them take a bit longer than they probably should.
In the case of Android, this should be done by trial and error. For example, turn off background animation, experiment with the image rendering mechanism - this depends on your specific device and it is impossible to recommend specific options. If your device does not have a more or less modern graphics subsystem, then lags will occur even with minimal settings, because Ren'Py usually always slows down on budget devices.