The level of each slot is not shared, the level of the secondary slot is not higher than the main slot level.
Use props scalable slot level.
Slot level and effect
slots can enhance the inlaid property in which the percentage of Orb, a total of 10 levels per liter of the slot to enhance the effect of 10%
Each slot has a separate level, need to be cultured separately.
Slot upgrade
the use of props Styx sand can be any slot cultivation, training must be successful, there are chances of crit, full experience after the automatic upgrade
can enter the consumption of props to upgrade the number of slots.