Original sentence: Astro City #5 featured a shapeshifting Enelsian, disguised as "Mr Bridwell"
Edited sentence: Astro City #5 introduced "Mr.Bridwell" (alias), a shapeshifting extraterrestrial and undercover advance scout for the invading "Enelsians," compiling, much like his (and their) namesake, an encyclopedic database of Earth's superheroes