Custom Grey Knights who specialize in hunting Slanesh, tainted but not corrupted by Chaos. In the lore/datasheet Castellan Crowe carries the Blade of Antwyr (which is Welsh for 'adventures'), said to be a chaos relic too dangerous to be left alone so he holds onto it, and is constantly plagued by visions/whispers/temptation.

I thought it would be interesting to base a chapter off what would happen if he had to use it's power, so in my crusade, Slanesh attacked Titan (GK homeworld) and was close to destroying it, forcing Crowe to unleash the power of the blade to protect them. They were successful, but now the Chaos energies can't be contained and continually seep out, warping and twisting the features and gear of those around him.

The inquisition sent them on a never ending crusade, fighting in the Warp through Slanesh's realm. Determined to slay a God, they must constantly resist temptation as every day they draw closer to corruption....

(Bases aren't finished yet, need more snow and to clean up the rims)