Ring Spirit Refinery

Refine 3 ring spirits of the same level to get a high level

• x3 Lv 1 and 500,000 gold = Lv 2
• x3 Lv 2 and 1,000,000 gold = Lv 3
• x3 Lv 3 and 3,000,000 gold = Lv 4
• x3 Lv 4 and 5,000,000 gold = Lv 5
• x3 Lv 5 and 10,000,000 gold = Lv 6