where to get magnet i need a lot

Go to inca, weapon shop, have rank 7-8 meat from osyla or anything even cypress wood works (but i find it fails the most).

Buy silvery shoes (170g)

Compound as much as you like.
you will get back shoes, magnets, white silvery ores or white silverys.

If you want the free time consuming way; then get shasha, get her to 70 amity, open the door in mayan forest where she does her death quest, on the second floor in the bottom left corner there is a mining spot. You can mine white silvery. you also get blue stone, silvery ore, white silvery ore and prolly black clay..

Compound white silvery and white silvery ore with anything of +4 rank cause magnets is a rank 5 so you want to fail silvery or anything of platinum base.

Good luck hope this helps.