Being on the run all the time, there weren't many places where Raze was able to store some of the items he had no use for. The extremely precious items he had used at the time of obtaining them. He needed them after all, in order for him to progress into becoming a 9-star mage.
Not only that, but when learning Dark Magic, it was the lowest of all his attributes, and he needed to experiment with ways to increase his Dark Magic power. It was the best type of magic he had for going up against the Grand Magus as they had no clue how to deal with it. The only sad part was that his Dark Magic could never outgrow the power of his wind magic due to the magic core he had.
Now, in his second life, things were different; he had a Dark Magic core and a head start with all his previous knowledge. However, there was one thing Raze had done. Knowing the spell he used would end his life and have him reborn, he had stored enchanted items in his vault that he could use.