The Desolate Heaven technique that Tao'er studied was extremely superficial and easy to understand.
However, understanding it did not mean being able to perform it. It was like a perfect circle drawn in a book. It may look simple, but replicating it with one's bare hands was difficult. It was a problem resulting in the poor control of one's hand.
Likewise, the difficult part of the Desolate Heaven technique was precisely the control of energy. Although the Ten Thousand Fey Empyrean Heaven's Desolate Heaven technique's heritage was far better than the Tian Yuan world's, the basic steps needed for the Desolate Heaven technique were the same.
Like the Tian Yuan world's Desolate Heaven technique, there were three steps, namely—
The first step, energy extraction. The second step, controlling the energy seal. The third step, forming the relic itself.