Tabu

Voodoo Shaman (otherwise known as The 48th Slave) was rumored to be a new champion, but is now considered cancelled.

On the 2010 Harrowing map, a coffin (on the extreme lower right) can be seen, containing him along with Averdian and the Plant King. This could be interpreted as a "nail-in-the-coffin" confirming his cancellation.

Abilities
Images and names extracted from the game files.