he loses power all the time what do you think he goes to odinsleep for? and Shazam faced against Spectre and held his own for a while. WHILE HIS AND ALL OF DCU's MAGIC WAS VERY WEAKENED. Till Spectre decided to finally kill him and absorbed everything against him and absorbed his magic. also Shazam faced against Mordru the most powerful Lord of Chaos and held his own. both are wayyy more powerful than Surtur, or Surfer. Odin would lose to PS. Spectre is lightyears from Odin when it comes to power so i doubt he'll ever turn PS into a mouse. besides Spectre did that to PS cause he knew he couldn't kill him until he severely weakened the magic in DCU. that alone tells wonders about PS's power.