First mentioned in chapter 371, when Shi Feng was appraising the loot from the Mechanical Slayer, and read the description of the Sword in the Stone.
Description[]
Mana Stones rare are materials required to craft Epic ranked weapons and equipment. They can be dropped by Bosses in 100-man Hard Mode Team Dungeons with 2% drop rate.[1]
Mana Stones can be obtained by synthesising 50 Magic Crystals. Grandmaster Alchemists only have about 20% of successfully synthesising. Shi Feng was able to use the upgraded Philosopherās Stone to synthesis a Mana Stone with 100% gurantee.<needed reference>
In chapter SS161, 10 000 mana stones are needed in order to convert into a primal lifeform. It is then said that Master Alchemists can synthesise Magic Crystals into Mana Stones utilising 100 Magic Crystals. However the success rate is not 100%, it is not mentioned the actual success rate but it can be assumed that it is close to 100% (assuming there wasn't an error during the translation)
- ā Chapter 371