Superman #357

In "Food for a God!", Superman finds himself trapped on the alien world of Tynolan, where he must watch helplessly as the villain Moxumbra secretly enhances Vartox with mystical energy to prepare him as a feast for a cosmic entity. With the help of Lois Lane, Jimmy Olsen, Lana Lang, and the reluctant Mayor Summers, Superman must uncover the truth behind the High Council’s sinister plan before it’s too late.

In "The Troublemaker of New Metropolis!", Superman III [Kalel Kent; Jon Hudson] must confront the unintended consequences of his own actions when he discovers his future super-speed feats have destabilized the molecular structure of the dome shielding New Metropolis—setting off a chain reaction of disasters that threaten the city’s very foundation. With the legacy of Superman [Kal-El] and the memory of Superman II looming, he races to understand how his power, once a force for good, has become the source of the crisis.