To upgrade weapons and equips you need to go at the temple. Click on the the blazing furnace at the middle.
Remember to unequip your weapons and armors before upgrading. Moreover, you need upgrade items to be discussed below. You need a lot of rupiahs to train items with a lot of upgrade items because failure is unavoidable.
To upgrade put your weapon/armor on your inventory, click it and then add an upgrade item.
Notes: You can't upgrade accessories. The higher lvl the weapon is the higher the price except for quest given weapons/armors. Some upgrade items are also given during quests, so be sure to do your quests. Lastly, save your upgrade ingredients for higher level equips. I suggest upgrading only if you think the next lvl equipments will take awhile to attain. Training items to +4 up to +7 would cause the item to revert back to +0 in a failed attempt. Training items +8 up to +15 would cause the item to disappear in a failed attempt.
Tips: Check the pot near the priest before training your items. If the red bar is at 50% or more, the success rates would be better. Please note that even the bar is full there is still a chance that you will fail. Also, please donate any junk items or spare rupiahs that you can spare before upgrading. It would take 45 Million rupiahs to fill the 2 bars of the pot.
Adding + to your items increases the price in every + you add. This means that upgrading from +1 to +2 has a different price than +2 to +3. In short, the higher + the more expensive it becomes. Weapon/Armor enhancements are not affected by this. It is still fixed.
Upgrade items:
Dipa Illa - 1~3 uncommon drops of all monsters and bosses, not sold at NPC's
Illa - 1~5 rare drop of all monsters and bosses, sold by Jeweler Ashuri at 50k
Azis - 1~8 rare drop by monsters and bosses, sold by Merchant Susan at Sachi 3, can also be bought via the Webmall
Surapa - 1~10 rare drop by monsters and bosses, sold by Merchant Susan at Sachi 3, can also be bought via the Webmall
Prajati - 1~12 rare drop by chaturangga monsters and exile monsters, sold by Merchant Susan at Sachi 3, can also be bought via the Webmall
Gavi - 13~15 rare drop by ET boss and Biryu boss, a quest reward, can also be acquired through joining some in-game events
Additional Upgrades:
Om Yantra - Adds 10 Atk successful if trained on weapon and helm and Adds 10 avoid if compounded on shield or belt, sold by Jeweler Ashuri for 25k rupiah
The following can be compunded on belt/shoes/helmet/pants:
Anahata - Heart +1 sold by Jeweler Ashuri for 37.5k rupiah
Vishuda - Nerve +1 sold by Jeweler Ashuri for 37.5k rupiah
Azna - Mental +1 sold by Jeweler Ashuri for 37.5k rupiah
Mani Pura -Muscle +1 sold by Jeweler Ashuri for 37.5k rupiah
The following can be compounded on weapon/armor/shield/gloves:
Visazan - adds Poison Atk +10 and Poison Resistance 2, sold by Jeweler Ashuri for 12.5k rupiah
Luvati - adds Lightning Atk +10 and Lightning Resistance 2, sold by Jeweler Ashuri for 12.5k rupiah
Raga Mani - adds Flame Atk +10 and Flame Resistance 2, sold by Jeweler Ashuri for 12.5k rupiah
Nila Mani - adds Ice Atk +10 and Ice Resistance 2, sold by Jeweler Ashuri for 12.5k rupiah
En Visazan - adds Poison Atk +20 and Poison Resistance 4, sold in the Item Mall for 15 taney
En Luvati - adds Lightning Atk +20 and Lightning Resistance 2, sold in the Item mall for 15 taney
En Raga Mani - adds Flame Atk +20 and Flame Resistance 2, sold in the Item mall for 15 taney
En Nila Mani - adds Ice Atk +20 and Ice Resistance 2, sold in the Item mall for 15 taney
Amala - refreshes upgrading
Max upgrade on items: +15
Maximum number of successful upgrades of enhancements = 10 stones
En stones (En Nila Mani, En Raga Mani, En Visazan, En Luvati) still have a chance to fail. To use them on an item, make sure that it will be the first enhancement that you would have to add. It has a sure success rate on the first 4 stones provided the item is free from any other enhancement.
What if my weapon is already +9?We are talking about enhancements. It's ok if your weapon has increased strength training.
Only the first four stones have a sure success rate. If the fifth stone fails, Then the 6th stone will have a sure success rate. For practical reasons, many people upgrade their weapons with 5 enhancement stones and 10 om yantras giving the weapon a 100 element and 50 AS.