After Liu Changxu placed the Thundercloud Tower in the valley, he began allowing the lineage's disciples to enter it for trials.
The Thundercloud Tower had thirty-six floors in total, just like the Azure Cloud Tower. Unlike the Azure Cloud Tower, however, it only offered trials for cultivators in the Qi Refinement, Foundation Establishment, and Golden Core realms.
Nor did each floor of the Thundercloud Tower have a Spirit-Communicating Puppet guarding it. Creating Spirit-Communicating Puppets from formations, as the Azure Cloud Tower did, was too difficult for Liu Changxu. He could not manage it yet.
When a cultivator entered the tower's first floor, the tower would automatically detect the intrusion and immediately launch spell attacks equivalent to those of an early Qi Refinement cultivator.
As long as the cultivator could block or evade the attacks and reach the teleportation formation leading to the second floor, they would have cleared the floor.
The Thundercloud Tower would then automatically teleport the cultivator to the second floor.
Of course, it sounded simple, but clearing a floor was no easy feat. Without formidable combat strength, it would be difficult to make it through the Thundercloud Tower's dense barrage of spells.
Naturally, if cultivators knew they could no longer withstand the attacks, they could activate the escape token in their hands, and the Thundercloud Tower would teleport them outside.
Conversely, if they failed to activate their tokens in time, their lives would be in danger.
In this respect, Liu Changxu's Thundercloud Tower still fell far short of its counterpart. After all, the Azure Cloud Tower was a fifth-tier middle-grade Spirit Treasure, while the Thundercloud Tower was only fourth-tier middle-grade.
The Azure Cloud Tower's artifact spirit possessed considerable intelligence, whereas the Thundercloud Tower's artifact spirit had yet to emerge and was still taking shape.
Still, Liu Changxu