The encryption used within the Stigmata not only prevents deciphering and changes to it, but it also has an alarm system. Overall, the changes are things that none had managed to achieve but this Stigmata has achieved it and even reinforced it with divine will such that the encryption will be alive and capable of adaptability.
Apart from the power of the divine will present within the Stigmata, somehow, the god that had tampered with his Stigmata and turned it into this prison had acquired unprecedented knowledge of Rune making needed to make the changes. So this god has both power and knowledge. It is something to marvel at considering Stelios thought he was the most knowledgeable god when it comes to runes.
