Question is self-explanatory. I'm curious about what is the most powerful magical artifact or object in Marvel Comics. Obviously things like Heart of the Universe, Infinity Gauntlet, and Ultimate Nullifier are excluded because I'm only talking about MAGIC, no science or cosmic type devices. It must be purely magical in nature.
Examples would be like the Crimson Gem of Cyttorak, Eye of Agamotto, the amphora that contained Zom, etc.