Letting the "Magic Brain Dropper" evolve on its own would allow it to continue being used as a magical tool.
Only its purpose would change slightly.
But it could still only be used as a magical tool within the laboratory.
The Magic Brain Dropper's sole function was to extract thought matter from the brain. However, it was extremely fragile and difficult to use anywhere outside the laboratory. And once it died, it was truly dead.
If he wanted to maximize its potential, it would be better to refine it into a Magic Spirit!
A Magic Spirit's immortality could make up for the Magic Brain Dropper's inherently fragile nature.
Besides, this was not Dark's first time conducting living-body refinement...
His experience refining two Demon Kings had gradually made him skilled in this area.
Once he decided to do it, all kinds of ideas came pouring in, rapidly unfolding in his mind.
The Magic Brain Dropper's intelligence was about to take shape, so he would need to use a Great Sin to safeguard it during the refinement.
That would not be difficult.
The Magic Brain Dropper itself was most compatible with Greed, and Dark had as many as forty points of Greed in reserve.
Even if thirty points had to be saved, he would still have ten points to use freely.
The question now was what target to designate.
Since he was going to refine the Magic Brain Dropper into a Magic Spirit, the first thing Dark thought of was the Cosmic Brain Monster from Digimon.
Though the Cosmic Brain Monster was not pleasant to look at, the Magic Brain Dropper itself was already a strange creation with its brain exposed. After looking at it for long enough, it was nothing special.
More importantly, the Cosmic Brain Monster was a Perfect-level Digimon.