All he had to do now was learn how to miniaturize it and store it somewhere in his body like his Aether Core and Aether Soul Core. While Space Storage or a spiritual dimension were valid solutions, after being deprived of them for most of his previous Ordeal he had lost his faith in these technologies and Spacial Skills.
There were items and resources he could do without, but a major card like the Purgatory should always be close at hand. Therefore, assimilating it into his own body was the ideal solution.
Now that the Bronze Artifact had his mental imprint, Jake immediately saw that miniaturizing or enlarging the object would be no problem. However, he also quickly realized that the Purgatory was already reduced to the minimum size of the Aether Soul Cores that make it up.