Thunder Stone + piercing stones

[Tekato]

Where can i find these please and thank you :3

[Reis]

Thunder stones drop from mobs, kind of rare. Piercing stones are the same, but you can also get them from disassembling magatamas you don't need with Kaguya.

[Tekato]

Wow thanks but it must be really rare i haven't seen any thunder ones drop D:

[Harukichi]

yeah it's really rare items, but i got many of them...
1pcs piercing stone.
1pcs cutting stone.
1pcs dark stone.
1pcs light stone.
1pcs thunder stone.
2pcs inferno stone.
2pcs miracle stone.