I feel like it's been pointed out a lot, but in this strip Redcloak is actually tugging his cloak over the phylactery in the last panel. Which begs the question why he put it on his left side of his belt and it somehow migrated to his right...?

Also, in the next strip in the second panel the wights are just standing there, close to Tsukiko. I found that detail pretty creepy.

Second page, third panel, one of the crewmembers has an O-Chul-esque scar over his face.