This is an Eldar Falcon Grav Tank on display at Warhammer World.
The Falcon is the primary battle tank of the Eldar army, its curved silhouette a familiar but much-dreaded sight to their enemies. The Falcon has a twin role upon the field of battle. It has a passenger compartment enabling it to carry a small squad of fighters to the battle front or rescue a beleaguered unit when resistance proves too fierce. It also carries a lethal assortment of heavy weaponry, and advanced targeters that allow it to fire devastating salvos while on the move.
One variant of the Eldar Falcon Grav Tank is the Fire Prism Grav Tank. Unlike the lumpen and unlovely battle tanks of other races, the Fire Prism is graceful and swift. Despite its aesthetic qualities, the Fire Prism sacrifices none of the killing power associated with heavy armour, and its prism cannon is the bane of the heavy battle tanks of the crude races.
The main armament of the Fire Prism is an extremely unusual device that uses a two-stage firing process. A medium-magnitude laser is discharged into a massive crystal prism that greatly amplifies the potency of the shot in a fraction of a second. This energy can be discharged in a focused beam capable of blasting through the thickest armour. Or, it can be dispersed to slay entire squads of enemy infantry. Most unusual of all, sophisticated tracking arrays allow this technological wonder to channel its firepower through the prismatic lens of another prism cannon, forming one all-powerful laser blast that can obliterate any target.