Mjolnir itself is made from Uru, described in the comics as a metal ore from the first moon in existence, and in both the MCU and the main universe from the comics swung against the shield of ...

This marks the first official mention of the indestructible metal in the MCU, and would also seem to confirm the rumor that Tiamut - the Celestial that was frozen mid-emergence in Eternals and now ...