The collective effort currently being carried out on the original letters is indeed perfect; Han Dong simply cannot intervene.
If he forced himself to help,
it might not only be ineffective but could also consume a significant amount of energy.
At this moment, Han Dong decisively became an "observer,"
watching the methods used by each letter holder,
observing the interaction between the light sphere and the black veil,
collecting as much information as possible with the "Real Demon Eye," while having an internal discussion with the doctor.
"Doctor, let's verify our previously reached deduced hypothesis once more... let's see what the success rate is."
"Alright."
With information observed through the Demon Eye, the black veil analysis data provided from the records, and memory of the "World Rubik's Cube,"
the doctor utilized materials from the Prison World to create a similar but lower-level black membrane within the laboratory.
