How to Create Spiritstone (Lesser, Intermediate, Greater)

Go to Noria's Chaos Machine NPC and choose second option (Create Spiritstone):

Create Lesser Spiritstone:

Combination Material: Normal set item or weapon, Minimum: +7 +4 Additional Option.
NOTE: The more Grade and Additional Options, the more the possibility of getting more pieces.

Create Intermediate Spiritstone:

Combination Material: Excellent set item or weapon, Minimum: +7 +4 Additional Option.
NOTE: The more Grade and Additional Options, the more the possibility of getting more pieces.

Create Greater Spiritstone:

Combination Material: Ancient set item or weapon, Minimum: +7 +4 Additional Option.
NOTE: The more Grade and Additional Options, the more the possibility of getting more pieces.