[EmanGr]

Why don't you make this dark race, ghost-like...? Zombies are really common nowadays. Ghosts that with dark magic, are able to stay on earth, and as creatures that live for many many years, they have to be the most knowledgeable race in terms of history, past events and such... They can also communicate with the dead, and summon spirits (being ghosts themselves, they have a natural affinity), they can possess and of course cast black magic. They are somewhat transparent (and have kinda better evasion), but they can take physical damage and get wounded... And they can look like other races, but a more ghostly, twisted and demonic form of them (like pale skin, reddish eyes, long nails, white hair. Oh! Also they could have white eyes in peace mode, but red in combat). Ghosts could be either gentle and etheric or demonic, filled with black magic (or you can make a proffession where they change and become more angelic using light magic and another one that makes them demonic, using the dark arts).

The aquatic race could be gorgon-like with fish characteristics like gills, but still beautiful.
That's what I'd like in a game, or a magical world, I always wanted undead that don't look like gross zombies and skeletons...