Normally speaking, Core Formation Stage cultivators rarely encountered heavenly tribulations.
It was only possible to trigger the appearance of the heavenly tribulation when the quality of a cultivator's golden core was too high.
This was unrelated to the cultivator's own merit and the method the cultivator used to form the core.
It only concerned the quality of the golden core.
The higher the quality of the golden core, the stronger the heavenly tribulation triggered would be.
For example, Lu Yuan's golden core that was formed by merging nine Foundation Establishment spiritual roots would trigger the most powerful Core Formation Stage heavenly tribulation.
A spiritual root would result in nine heavenly tribulations.
Nine spiritual roots meant 81 heavenly tribulations!
The number of spiritual roots determined the number of heavenly tribulations.
The quality of the spiritual root determined the latter's power.
