The six main attributes had always caused Marvin headaches, as they were the most difficult things to improve.
At this point, even if he increased the level of his Legend Class, he wouldn't gain any more attribute points from it.
To increase his attributes now, he had to do it like the natives did, by tempering himself.
Marvin had previously tempered his Strength and Constitution with the former leader of the Night Walkers, Sean, increasing those attributes to some extent.
Although the Essence Absorption System that he possessed was amazing, it had its limits.
After reaching the Legend realm, the essences that would still give him noticeable benefits were becoming fewer and fewer.
Naturally, this was related to the battle experience he got from killing monsters.
The only real help he could receive from the Essence Absorption System was when he killed lifeforms on the same level as Divine Servants.