Blades of Fury
From Halopedia, the Halo wiki
Blades of Fury
Blades of Fury is a Halo 3 Achievement that is gained by getting a Sword Spree on Heretic which is one of the Mythic Maps. This can be done in either a ranked or a social playlist.
It is worth 25 Gamerpoints.
It is represented by a Sword Spree Medal.