Upgrade System

The Normal Upgrade System allows weapons and armor to be upgraded up to +20 using Upgrade Cores of the matching grade. Success rates decrease as the upgrade level rises. Upgrade points accumulate with each level: roughly 700 upgrade points add a 20% stat boost, around 1200 points give 45%, and 2900 points reach 75%. Levels from 3000 to 4500 upgrade points offer 95–99% boost.

Introduced in the modern era, the Extreme Upgrade System allows items already at +20 to be upgraded further, up to +20 extreme levels. Three Repair Kit types determine what happens on failure: Bronze Repair Kits have a 90% success rate but the item is destroyed on failure; Silver Kits have a 50% success rate and the item is kept on failure; Gold Kits guarantee 100% success. The system applies to armor, weapons, and bikes.

The Divine Upgrade System requires items at +15 or above. A Divine Converter costs 10 million Alz plus 200 AP to convert a suitable item. Divine Stones are crafted through Request Crafting and used to advance Divine levels from 0 to 15. Success rates begin at 100% for the first few levels and drop steeply, reaching about 6% for the 14-to-15 step. Fragment of Divine Core drops from the Glacies Inferna dungeon.

The Chaos Upgrade System applies to special accessory items: belts, talismans, earrings, amulets, bracelets, Carnelia, and Arcana. Unlike normal upgrades, failure can destroy the item entirely. Chaos Cores drop from the Eternal Chaos Arena and are also obtained by extracting belts. A Chaos Talisman upgraded to +10 becomes a Talisman of Destruction. In the modern era, Chaos Upgrade was extended to rings (EP XLIII) and to Extortion/Fighter/Sage bracelets (EP XXVII).