Table of Contents
Items
Items may have a unique quality like 
Cure or 
Repair. Or they may have tiers like armor pieces, e.g., 
Boots 1 and 
Boots 2. And they may have tiers and levels like weapons, e.g., 
Sword 1 Level 1 and Sword 1 Level 2. As a rule of thumb the higher the tier or the higher the level the better the item. But there are exceptions to that rule, too.
Items
Combinations
Combining the same item with different tiers and levels results in the same item of the higher tier and the higher tier's level plus half of the other level.
Example
Axe 3 Level 1 + 
Axe 1 Level 2 = Axe 3 Level 2
- Axe Tier 3 is higher than Axe Tier 1, therefore the resulting item is an Axe Tier 3
- The higher tier axe has Level 1, the lower tier axe is Level 2, therefore the resulting level is 1 plus half of 2, equals 1 + 1, equals 2
To level up a weapon, just combine it with Tier 1, Level 1 of the same weapon.
The above rule always holds, also when combining different items to form a new one. E.g. creating 
Celtis 1 by combining 
Shot 2 and 
Hammer 1. But, if you combine items of the same tier to form a new item, the rule does not apply and the levels are simply added together without any penalty.
