miljenko
Thanks but is there some algorithm tor that or its just random, like is there some stage that wil 1...
Each equipments have certain limit upto which you can upgrade it like for Normal Weapons: it can be freely upgraded upto +20 but that is its limit if you want to upgrade it even after that then you have to use elemental stones to break the limit, after that you can upgrade it.
For Magical grade limit is +40, rare grade is +60, epic grade is +80 and legendary grade's limit is +100.
Overall it will increse battle power with taking a lot of cost but it will never affect its tier...
As for new tiers i think there is an algorithm,
A lair consists of 10 levels and if you clear it and then you have to clear further 5 levels of next lair to activate the drop of Next tier....