"It would be advisable to seek shelter when it rains."

Spock wasn't budging towards Dorian, or the mud. "And I am not aware of the shackles you speak of." He wasn't wearing any invisible ones if that's what Dori means. Not that it would be logical for the vampire to assume he was wearing invisible shackles in the first place.

He brings a hand up to shield his eyes from the mist. It was not pleasing to Spock that his hair was getting wet.