Great addition to Out of the Abyss. The encounters listed here make a great addition to the long travel times on the Darklake. I used all of the encounters here and they worked great. I really loved the Dragon of the Depths encounter. When I first read it, I wasn't so sure, but it turned out great. Having the threat of a Dragon for 4th level characters was amazing and really emphasized how outgunned the party is at the early stages of the campaign. Also, it didn't hurt that one party member had to roll on the wild magic table before this and summoned a flumph. Amazing coincidence. All in all, a great addition to the Out of the Abyss campaign and well worth the asking price.
[5 of 5 Stars!]