If there was no need for prayer and no need to use Alchemical Portion, the Flesh-sculpting Ritual would have become a very simple process.
Ybur activated the power of the Wish Technique, watching the tiny Elemental Micro-spirit "melt" within his tentacles. This was actually a normal step in flesh-sculpting, a unique technique that merged magic, alchemy, and prayer. Flesh-sculpting wasn't as straightforward as surgical operations. Normally, the organ to be transplanted would melt into a pool of liquefied flesh and blood—this substance was called the "Flesh-sculpting Toxin." Afterwards, the recipient of the transplant would only need to drink this substance.
Then, the Flesh-sculpting Toxin would reassemble inside the recipient's body.
But it was called "toxin" because it indeed possessed a high degree of danger. The reassembly process involved the rejection and conflict between two living beings, a process as deadly as a real poison.