After ending the debate about humanity, the C'tan began modifying the Thunder Warriors alongside the Emperor.
When conducting the relevant experiments and research, the Emperor had originally needed a great many auxiliary tools. Now, the C'tan also required equipment and instruments, because they had to control with absolute precision the effects of their power on mortal flesh.
The C'tan could easily achieve precision, but whether their precision was precise enough for mortal flesh was another question.
Bandis and the others neither fell asleep in their chambers nor were anesthetized. They watched helplessly as their bodies changed within the chambers.
"What level will the modified Thunder Warriors reach?" Guilliman asked curiously.
"The level where they can kill a Greenskin warboss in a one-on-one fight," the Emperor said.
Though he still did not know exactly what the C'tan could turn the Thunder Warriors into, the Emperor could roughly infer the path and direction of the modifications.
"It cannot be compared so simply." Burner turned around. "The new Thunder Warriors will be high-level combat units."
In the C'tan's eyes, war was likewise a battle of soldiers against soldiers, generals against generals.
Low-level combat units were meant to be traded for low-level combat units, while high-level combat units were meant to be dealt with by high-level combat units.
"One thing is certain: they will far surpass the Astartes, though their combat power was already much greater than that of the Astartes." The Chronicler spoke.
As if to show off to the Emperor, the C'tan introduced their improved masterpiece while carrying out the modification process in their peculiar manner.
"They will contain no mechanical components. Everything will be based on transformed bio-energy."
"They will only need to absorb sunlight to survive and fight."
"They will stand around five meters tall."
"Although we cannot replicate Mephet'ran's