Added Stones Upgrade system

[y2k]

Added a stone upgrade system. New Heroic Stones can be obtained in dungeons such as “Cube Dungeon,” “Parallel World,” and “Circus.”.
Stones can be upgraded: 10 Heroic Stones (one type) + Rune (sold by the Ursa Points Merchant) = Teardrop Stone (chance of success: 30%).







A +45 stone can be enchanted to +60. To do this, you will need: 1 +45 gem and 1 engraving pen. Result: a +60 stone. Success rate: 100%