Silhouette Sword

From Halopedia, the Halo wiki

Silhouette Sword is a glitch can be done with an Energy Sword on Halo 2 and Halo 3. This glitch gives the player no tactical advantages, but is for the pure amusement of the eye.

Halo 2

To perform the glitch, follow these steps.

  1. Obtain the Blind Skull to use its effect.
  2. Obtain an Energy Sword.
  3. Switch to your secondary weapon and then back to the Energy Sword.

Halo 3

To perform the glitch, follow these steps.

  1. Obtain an Energy Sword (must have at least some ammo in it) and at least one other secondary weapon.
  2. Execute the “Cease-fire” trick on your secondary weapon.
  3. Switch back to your Energy Sword.

Effect

If performed correctly, on the player’s screen only, the Energy Sword’s basic image will be replaced by a ghostly, active aura. In Halo 3, when attacking any target that does not make the sword’s reticule to turn red (inanimate objects, allies, etc.), the sword will materialize, but the swiping animation of the sword on the player’s screen will be canceled. It's hilarious to attack allies with this trick to watch them just mysteriously "drop dead".