Collect the following Letters I, P, H, O, N, E drop from bosses
I - Kalry Boss (Mudha Dungeon)
P - Asuramaya Boss (Forge)
H - Raphu Boss (Chaturangga)
O - Meghamalin Boss (Shambala Dungeon Floor 2)
N - Buk Gun Boss (Emperor's Tomb)
E - Japeta Boss (Fortress Dungeon)
NOTE: YOU MUST COLLECT AND COMPLETE THE LETTERS TO CRAFT STONES IN MANDARA'S CRAFTING MANAGER