"what's your favorite horror movie?"
idk probably the fact that ever since Dan found out about the nightmares that Nephrus was having (I mean he was already worried with the whole mentioning-the-foresindicated(? on spelling)-and-almost-choking thing but) he told him he was going to try and help even when he didn't know the full context and that he didn't have to carry this alone.
But when it came down to it, he couldn't help Neph
he did everything he possibly could have with the knowledge he had and it still wasn't enough to protect him. they held onto Neph's arm as he sank into the earth with grip tight enough to bruise but he still slipped out all the same. he couldn't do what he said he was going to, he couldn't keep his word and he couldn't help him. because it wasn't enough
he told Nephrus he wouldn't be alone in this but even though they don't know where he is they know he isn't somewhere he wants to be, most likely at the will of someone who terrifies him. and there is nothing Dan can do, at least not as quick as he would have liked. the whole party is trying as best as they can to get him back, but in that moment his best wasn't enough, none of their bests were. it wasn't enough
in basically their first interaction it was Dan trying to help him hide himself with his cloak and finding them all a place to hide and keeping their whole group safe. but the last time they saw each other it wasn't enough,
they can promise and swear and reassure as much as they like but that doesn't change the fact that it wasn't enough