The robot restarted and swung its arms into a blur, the actions of mining Spirit Stones were impossible to discern with the naked eye; one could only see the Spirit Stones disappearing layer by layer as the space receded inward.
Lu Xingyan specifically observed for a while and confirmed the robot's mining speed, which reached eight hundred catties per minute; she nodded in satisfaction.
[Looking at it, it's pretty useful, and it doesn't need to endure Heavenly Tribulation despite being of Immortal Grade.]
Even though they were in the Secret Realm, Heavenly Tribulation caused by breakthroughs or Artifact Refining and Alchemy would not be blocked by the Secret Realm; it would strike all the same.
No matter Artifact Refining or Alchemy, reaching a certain level would invoke Heavenly Tribulation, though it's said that the quality improved after Heavenly Thunder Baptism.
But Lu Xingyan was planning to forge a hundred of these machines.