My idea for a mount(s):
I was thinking of a miniature 3-5 seater airship that looked visually similar to the Gunships in Icecrown Citadel but there would've been too many complications.[Buggy of Doom]
Location:
[Schematic: Buggy of Doom] is sold by a male Goblin within Orgimmar, or female Gnome within Stormwind for 25,000 gold.
Type:
Land and water.
Description:
A 3-seater ground mount that looks like a militarized 4-wheeler buggy, with two mounted cannons on the side that deal damage to a location, based on a percentage of your attack or spell power in a 5 yard radius. When moving onto water, the wheels turn over and propel the vehicle with air.
Notable features:
Two mounted cannons on either side of the buggy and a special animation that turns the wheels over and propels air out of the middle of the tires.