> For the complete documentation index, see [llms.txt](https://docs.empiresbattle.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.empiresbattle.com/game-mechanics/item-synthesis.md). # Item Synthesis {% hint style="info" %} **Item synthesis in Empire’s Battle is a core mechanic that allows players to upgrade their heroes’ equipment** — weapons, armor, accessories, and boosters. {% endhint %} ### **FEATURES:** ▪️ There are 10 levels of synthesized items in total. The base level is 0 (available for all items by default). An item is considered synthesized starting from level 1 and is displayed in the inventory with a level indicator. **Synthesis Scheme 1 (same levels)** 0+0 = lvl 1 1+1 = lvl 2 2+2 = lvl 3 3+3 = lvl 4 4+4 = lvl 5 5+5 = lvl 6 6+6 = lvl 7 7+7 = lvl 8 8+8 = lvl 9 9+9 = lvl 10 **Synthesis Scheme 2 (one level lower)** 0+0 = lvl 1 1+0 = lvl 2 2+1 = lvl 3 3+2 = lvl 4 4+3 = lvl 5 5+4 = lvl 6 6+5 = lvl 7 7+6 = lvl 8 8+7 = lvl 9 9+8 = lvl 10 ▪️ Synthesis enhances an item’s attributes — energy, defense, attack power, dexterity and power — increasing its overall value and effectiveness. ▪️ The success rate of synthesis depends on the selected scheme, item level, and rarity: standard, uncommon, rare, epic, legendary, or limited. ▪️ If synthesis fails, one or both of the source items may be destroyed. ▪️ Limited items (for example, from the Legends of the Past set) are always synthesized successfully. ▪️ Synthesis time may range from several minutes to several hours. {% hint style="info" %} **‼️ With an active “Master” subscription, your chances rise significantly:** the success rate of synthesis for any scheme and at any level increases by 5%, and the synthesis time is reduced to just 1 minute. {% endhint %}

SYNTHESIS OF FIRST-CATEGORY ITEMS

***Hero equipment items of rarity\*\*\*\* ****“S” are standard (gray)****.*** **Synthesis Time** ▪️ Lv. 1–3: 5 min ▪️ Lv. 4–6: 10 min ▪️ Lv. 7–10: 15 min **Attribute Enhancement** ▪️ Lv. 1–3: +15% ▪️ Lv. 4–6: +20% ▪️ Lv. 7–10: +25% **Probability of Item Destruction on Failed Synthesis** ▪️ Lv. 1–3: one — 100%, two — 0% ▪️ Lv. 4–6: one — 75%, two — 25% ▪️ Lv. 7–10: one — 80%, two — 20% **Synthesis Success Rate** **Scheme No. 1:** ▪️ Lv. 1–3: 100% ▪️ Lv. 4–6: 80% ▪️ Lv. 7–10: 75% **Scheme No. 2:** ▪️ Lv. 1–3: 75% ▪️ Lv. 4–6: 70% ▪️ Lv. 7–10: 65%

SYNTHESIS OF SECOND-CATEGORY ITEMS

***Hero equipment items of rarity\*\*\*\* ****“U” are uncommon (green)****, and\*\*\*\* ****“R” are rare (blue)****.*** **Synthesis Time** ▪️ Lv. 1–3: 10 min ▪️ Lv. 4–6: 20 min ▪️ Lv. 7–10: 30 min **Attribute Enhancement** ▪️ Lv. 1–3: +25% ▪️ Lv. 4–6: +30% ▪️ Lv. 7–10: +35% **Probability of Item Destruction on Failed Synthesis** ▪️ Lv. 1–3: one — 100%, two — 0% ▪️ Lv. 4–6: one — 80%, two — 20% ▪️ Lv. 7–10: one — 85%, two — 15% **Synthesis Success Rate** **Scheme No. 1:** ▪️ Lv. 1–3: 100% ▪️ Lv. 4–6: 85% ▪️ Lv. 7–10: 80% **Scheme No. 2:** ▪️ Lv. 1–3: 80% ▪️ Lv. 4–6: 75% ▪️ Lv. 7–10: 70%

SYNTHESIS OF THIRD-CATEGORY ITEMS

***Hero equipment items of rarity\*\*\*\* ****“E” are epic (purple)****, and\*\*\*\* ****“L” are legendary (orange)****.*** **Synthesis Time** ▪️ Lv. 1–3: 30 min ▪️ Lv. 4–6: 60 min ▪️ Lv. 7–10: 90 min **Attribute Enhancement** ▪️ Lv. 1–3: +35% ▪️ Lv. 4–6: +40% ▪️ Lv. 7–10: +45% **Probability of Item Destruction on Failed Synthesis** ▪️ Lv. 1–3: one — 100%, two — 0% ▪️ Lv. 4–6: one — 85%, two — 15% ▪️ Lv. 7–10: one — 90%, two — 10% **Synthesis Success Rate** **Scheme No. 1:** ▪️ Lv. 1–3: 100% ▪️ Lv. 4–6: 90% ▪️ Lv. 7–10: 85% **Scheme No. 2:** ▪️ Lv. 1–3: 85% ▪️ Lv. 4–6: 80% ▪️ Lv. 7–10: 75%

SYNTHESIS OF FOURTH-CATEGORY ITEMS

***Hero equipment items of rarity\*\*\*\* ****“L” are legendary (orange)**** ****limited items with a restricted release (for example, the Legends of the Past set), while items of rarity**** ****“A” are artifact (red)****.*** **Synthesis Time** ▪️ Lv. 1–3: 1 hour ▪️ Lv. 4–6: 2 hours ▪️ Lv. 7–10: 3 hours **Attribute Enhancement** ▪️ Lv. 1–3: +35% ▪️ Lv. 4–6: +40% ▪️ Lv. 7–10: +45% **Probability of Item Destruction on Failed Synthesis** ▪️ Lv. 1–3: one — 0%, two — 0% ▪️ Lv. 4–6: one — 0%, two — 0% ▪️ Lv. 7–10: one — 0%, two — 0% **Synthesis Success Rate** **Scheme No. 1:** ▪️ Lv. 1–3: 100% ▪️ Lv. 4–6: 100% ▪️ Lv. 7–10: 100% **Scheme No. 2:** ▪️ Lv. 1–3: 100% ▪️ Lv. 4–6: 100% ▪️ Lv. 7–10: 100%