Worship the Deep
Adrian suddenly remembered that he did have someone like Altum and that he still has a mission to make the Dark God Dagon a holy relic. He has not talked much about this with Altum as there are barely any players in the guild that can swim in open water without losing their breath. The only ones that can do so are Adrian, Kabrakan, Peridot, and Altum. Adrian has a protective layer when he enters spaces that are unnatural, and he does not need air to breathe.
Kabrakan can change his armor to suit the seas which is why he was the one that helped Altum the most. Peridot is a dragon which makes her easily traverse the sea as her dragon species is tied to water more due to being close to the moon. Altum is a given since he is a Deep One and the Champion of Dagon. Adrian wanted to search the oceans and seas which is why he tasked Kabrakan and Peridot to help Altum level up when they are free.