Guaranteed Activated Critical Strike. 15-30s Cooldown.
Hitting at least 3 enemies with an attack, restores 12-15% toughness.
70-100% Critical Weak Spot Damage.
18-30% Toughness on Elite Kill.
Here's my Grey Knight build ( here's the original - https://darktide.gameslantern.com/builds/9da51441-94cb-4d28-b4b7-c4d0211a37b3/grey-knight-psyker-smite-telekine-high-crit-tank-melee-bolter ), referencing the legendary Kaldor Draigo - bane of daemons across Warhammer. This build is suitable for both large-scale crowd control of all enemies on the battlefield (including big groups of elite foes and specialists), and for humiliating the unfaithful to the Emperor in melee combat using a two-handed greatsword, as well as at range with a bolter pistol.
Remember! This build is designed solely for roleplaying Kaldor Draigo, and for that purpose only! It is not intended for the easiest possible playthrough on maximum difficulty with additional complications, so don't expect anything supernatural from it!
Thank you for your attention :)