"Cypher, the Fallen One is an enigma to even the most learned minds of the galaxy. Spreading strife and animosity whenever he appears. It is rumoured he was once a member of the Dark Angels Space Marines Chapter."
"The terrible secret of the Dark Angels is that during the Horus Heresy some of their brethren were converted to the side of Chaos. The renegades were defeated in a battle that destroyed the Dark Angels' home world, Caliban, but many of the traitors survived to be cast through space and time by the Chaos gods. These survivors are known to the Dark Angels as "The Fallen". Of these Fallen, the most powerful and the most hated is Cypher. It is said that he carries the Lion Blade - the broken sword of the Primarch of the Dark Angels. For this reason the Dark Angels have pursued him across the universe in an attempt to reclaim the sacred blade."
"The rules for Cypher can be found in UK White Dwarf 281."