Cytorrak participated in the Octessence. The collapse of his temple is assumed to be the reason why the other Exemplars did not emerge after Cain Marko became the Juggernaut.
Crimson Dawn
Cytorrak does not have any known connection to the Crimson Dawn other than his history with Gomurr and Tar.
When the Juggernaut was transformed into Kuurth, Cyttorak believed he finally started acting as Cyttorak had always wished him too. However, Kuurth served the Serpent, not Cyttorak. Magik revealed this to the crimson being, who became enraged, and offered him to chose a new avatar, so Cyttorak took his power back from Marko. Magik intended to become the new avatar herself, but Colossus intercepted, becoming the new Juggernaut, much to the displeasure of Kitty Pryde.
The Valkyrie with her sword, DragonFang, was unable to sever the Crimson Bands of Cyttorak, yet with the Ebon Blade, the Black Knight (Sir Percy of Scandia) could. Source: Black Knight Vol 1, No. 3 August 1990; Featuring: Doctor Strange, Valkyrie, Morgan Le Fey, Evil Eye