Halo Weapons Part 12-Energy Swords

It's okay if I skip to the melee right? okay, The energy Sword, my favorite weapon in Halo, this weapon is usable to the player between Halo 2 and Halo 3, the good thing of the weapon is that it's strong to every units, every kind, everything.
This weapon was strong to every kind of unit, every slash you use to attack enemies only drained 5-7 energy (The energy will not drain if you don't hit living thing, so don't worry if you miss)

The weapon was strong to every type of units but not very good to attack vehicle, anyway this weapon stores allot of energy than any melee weapon in Halo, apparently this weapon is not available in the first Halo and Halo anniversary but available at any different Halo series