Basically, Roman's choice had not come as a surprise to Luo Zhen.
Given Roman's current condition, it was unlikely that he could reclaim the Rings of Solomon.
Not only had he already discarded all the power he possessed as Solomon, but under his current circumstances, Roman probably couldn't use the nine rings even if he had them.
After all, at present, Roman had nothing except the residual magical energy from the Holy Grail he had obtained by winning the Holy Grail War.
Luo Zhen, on the other hand, had absorbed all of Solomon's power as nourishment and grown into the individual he was today. Naturally, he could use the Rings of Solomon.
As long as he wore all nine rings on his hand, he wouldn't need the forged tenth ring. The rings would be able to communicate with "Miracle" on a spiritual level and unleash the full power of all ten rings.
At that point, Luo Zhen would be able to nullify any magecraft in the world and bring all of it under his command, becoming the second King of Magecraft after King Solomon.
That was why, after Goetia's destruction, the rings had flown into Luo Zhen's hands of their own accord. It was essentially their recognition of him as their master.
Therefore, both emotionally and logically, whether for the sake of his own condition or for the feelings and bond he shared with Luo Zhen, Roman would choose to hand all the rings over to him.
"Perhaps they'll fuse with your soul like the tenth ring did, trigger a chemical reaction, and undergo a qualitative transformation, eventually evolving into a power comparable to 'Miracle.' You never know."
Roman said this to Luo Zhen.
Luo Zhen nodded.
"All right, then I'll take them."
This was something Luo Zhen had prepared