Max knew that the ritual he was about to perform was not only complex but also extremely dangerous. It was a forbidden soul magic, a power that even the most skilled gods dared not to dabble in.
This type of magic delved into the very essence of a creature's soul, and any mistake could lead to catastrophic consequences.
Although he understood that it was dangerous, he did not understand the exact level of danger associated with this magic.
The longer duration for which one was dead, the easier the ritual became since the spirits connection to the body waned, hence the ritual that Max was about to perform was about as safe as it could get with thousands of years having passed since the death of the Gryphalos.