They are also divided into five categories: minor, intermediate, advanced, potent, and extreme. The first three, besides the inherent abilities of the gemstones themselves, can cast limited regeneration techniques one to three times. This regeneration technique can reattach limbs but cannot regrow severed limbs. The potent and extreme categories respectively have the capability to use the regeneration technique one to two times.
The price starts at thirty thousand and doubles increases—the extreme regeneration rings can sell for up to one hundred and fifty thousand gold coins on the market, and that's with people scrambling to get them.
