The Grand Black War Mammoth grants their wielder the ability to summon an epic ground mount. The item has a very low drop chance.
Unlike the Traveler's Tundra Mammoth, the Grand Black War Mammoth does not carry any vendors, although it can still hold 2 passengers.
Patch 3.1.0 (14-Apr-2009): This mount is no longer considered a vehicle.
Now fully a mount, with fall damage, instant mount/dismount, and swimming ability.