A specific dungeon like Temporal Sanctum.
At the end there will be a special forge as reward with some special mechanic.
First function is combine two identical unique item into one, and reroll the numbers on the unique item.
Output unique item’s legendary potential will take the higher one.
potential 0 + potential 1 = potential 1 .
Second function is if forge two unique item with “same legendary potential”, the outcome normally will still be reroll numbers, but if get critical success, the legendary potential will be add 1.
ex. leg potential 1 + leg potential 1 and critical success — output leg potential 2
So there will be no mindless throwing eight leg potential 1 to get one leg potential 4.
Player who want to stacking leg potential to get higher potential will generally get disappointed.