Physically, Magus didn't seem to react to the world around him. For all intents and purposes he might as well have been a corpse hidden under black robes for all the care he offered the world around him. 

Internally, he was rather overcome with curiosity.

Since the moment he had taken his seat, Magus had been assaulted with a feeling of dread... of not belonging or being welcome here... It was a feeling he was very used to, since this world was not his own nor was he welcome in it. But as he seemed to adept to the stronger than normal feelings of not belonging, he couldn't help but ponder why he felt these feelings in the shadow of what he was told was the Shadow Temple of Hyrule. 

As a being of shadow and darkness himself, Magus suspected that what he got was merely a slap on the wrist compered to what the standard light dwelling must have felt when coming to this place... but why did it lash out at him at all? Light and Darkness were not inherently good or evil. In fact, out of the two Darkness tended to be the more welcoming and peaceful since it embraced all equally while the Light judged and either chased away or burned what it deemed unworthy to bask in its glow. 

So why would a place dedicated to Shadows be so actively hostile to all who came towards it? 

Too many possibilities, not enough information to narrow it down.