Return of the Phantom

Relevance:
*) the picture puzzle -- Erik's a puzzle fetishist, we're told, but it
   operates by puzzle magic

*) Erik's door -- this actually fits, using believable technology, and being
   reasonably useable in practice.

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Real-time:
*) the picture puzzle -- non-arcady, put there are a lot of tiles to flip, but
   there's an auto-restore
*) fight in Erik's chamber -- easy, non-arcady, auto-restore
*) chandelier fight -- easy, non-arcady, auto-restore

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Difficulty:
*) the maze -- You are in a maze of twisty passages, all alike.