506 Patriarch Black Dragon

Lightning Dwarf Star and Fiend Prison were the two treasures that Meng Chuan wanted the most after reading Eternal Tower's list of Fifth Tribulation treasures.

Fiend Prison. Meng Chuan probed the prison phantom with his consciousness.

Fiend Prison: Fifth Tribulation treasure. The prison itself contains void array formations. Furthermore, the prison is split into nine layers. The lower the layer, the stabler it is. In addition, the prison has many punishment methods. It's difficult for ordinary Sixth Tribulation Eminences to escape once they are imprisoned. One flaw is that the Fiend Prison can't attack the outside world. Price: 60 Outer Realm Essence Crystals.