Steven/Marc is in some form of mind trap induced by Harrow and the title characters multiple personalities. Probably triggered by being shot. Unexpectedly Taweret shows up at the end. She's the goddess of child birth but by extension creation itself.
Episode 3, at the end of the fight scene, neither Marc or Steven know who created all the carnage. Where have we witnessed this behavior before and if neither Steven or Marc remember is Taweret there to help them 'birth' a 3rd personality?
** Edit, right before involuntarily meeting Taweret, there was a sarcophagus they both declined to open...
This is next level writing.