Hydrant is actually a goblin inventor. Instead of coming up with ways to mange the opponent better, Hydrant has created several ideas on how to move water efficiently.
His greatest idea was a tank that could be attached to a troll, who could pump the water into a hose with great pressure. (a troll pumping causes that often...)
The pump however is unreliable, as the troll might break the handle, causing the pump to go out of control. The contraption also leaks badly, wasting water nicely.
The tank also looks a little like a cooked bird, earning it many bitemarks from the occasional hungry nibble of a troll.