serisiinin
Serisiinin is a fictional element appearing in the Marvel Comics universe. It was first introduced in the comic book series X-Factor vol. 1 #52 in February 1990. Serisiinin is depicted as a rare and highly unstable element, often associated with advanced alien technology or the genetic manipulation of extraterrestrial beings. Its properties are largely undefined, but it is typically portrayed as having significant energy-releasing capabilities or acting as a catalyst for extraordinary biological or technological transformations.
The element is most prominently featured in storylines involving the Shi'ar Empire, a prominent alien race