I'd love to tackle this one.
Remember the Giant Snails, Crystal-Turtles and spiders prior to Ji-Kun in the Thunder King Raid. Products of scavengers off of the run off of Titanic Power of fleshshaping experiments. The Waters in the veil may be more pure but they also are Titan empowered. The water from the Veil flows directly into the heartland infusing every living creature plant animal or otherwise with abundant life energy. So much energy that even the rabbits have gained a higher intelligence and size. The Jinyu, Hozen and possibly the Pandaren are all products of Titanic evolution through the waters of the Veil.
I may be dating myself but think of the Mutagenic ooze from Ninja Turtles.
The reason the rabbits are there is that one of the devs read Watership Down and liked it so much he had to put it in the game.
Last edited by akamurdoch; 2013-08-30 at 06:58 AM.
"Have you had the dream again? A black goat with seven eyes that watches from the outside."
When I first leveled up to 90 with my affliction warlock those god damn low hp rabbits caused me to rage hard. So annoying trying to kill a bunch of them with seed of corruption. So annoying.