Bloodblade

An unidentified variant of the Type-1 Energy Sword appears in the Halo: Evolutions short story Headhunters and later in Halo 2: Anniversary's Multiplayer. It seems to be mainly employed by Covenant Special Operations. Its only major difference to its normal counterpart is that the blade glows with a red coloring, rather than the traditional blue.

Trivia

 * In Halo 2: Anniversary it is solely used as the weapon wielded by infected players in the Infection gametype.