A combination of ceremonial elegance and practical power, the twin-bladed Energy Sword can be used as a slashing melee weapon, or in correct fighting technique, the wielder waits until the opponent reaches a perfect distance and lunges forward in a ferocious attack.

NOTE: So it looks like the melee lunge is still in, which means that fall damage is out. No word on how the weapon actally works, though. In Halo 2, the weapon was limited in campaign mode like all Covenant energy weapons, but in multiplayer it was unlimited. Will that remain? Time will tell.