The Deep is a mini-faction for Relicblade, made up of two models and an eight-card pack, each sold separately. Uncommonly for Relicblade they come on 30mm bases.
The Eel Sorcerer has a snake and a lamp, so you know he’s serious. Unlike most other Wizard characters he only has 4 AD, but he has a useful dagger and ranged spell attack, so doesn’t necessarily need a bunch of 2-AD upgrade spells.
The Shark Warrior, on the other hand, just has blades. Nasty nasty blades. As a Knight, he gets access to cool upgrades like Sword Master and Writ of Justice.