Rockwellium
Rockwellium is a fictional element appearing in various comic book storylines, most notably within the Marvel Comics universe. It is often depicted as a highly advanced and virtually indestructible material, possessing unique properties that make it invaluable for technological development and weaponry. The origin and exact composition of Rockwellium vary depending on the specific comic book series or writer, but it is consistently portrayed as a substance of immense rarity and power.
In some narratives, Rockwellium is a byproduct of advanced alien technology or a rare element found only