Whoa whoa whoa hold on a moment. First, Max is invisible. Literally invisible, and any sound he makes is also null. The only way Shezar could notice him in that situation is if he passed through smoke and Shezar noticed it part through his passage, or if Shezar has some magical or otherwise supernatural means of seeing through his concealment.
Thanks to his night vision and enhanced senses, Max was able to notice Deacon Frost (thought he doesn't know it's Frost) in the night from where he was giving orders and is coming closer to see what he can learn.
So erm, yes, you should probably change that.