Not long after Rezen received the potion, he immediately bade goodbye and went back to his villa anxiously. He was afraid that someone from the academy would discover that he possessed such a valuable potion and snatch it from him forcefully. Truly, having wealth without enough power is enough to make a person die from anxiousness
Fortunately, Rezen was able to safely return to the villa and when he thought of it, he might be too paranoid. At the very least, his roommate and friend is the lover of the Tryst Academy's Headmaster. While Potential Explosion Potion is extremely precious, it was not enough for people to ignore the deterrence of a high cycle Senior Mage
Of course, if it was known that Rezen had hundreds or even thousands sets of ingredients for the potion then that is another matter