The Black Beast of Arrgh
The Black Beast of Arrgh is a boss-like foe in Foundry. Defeating it and its group of 2 Rage Titans and 2 Misery Titans is the last objective in the quest Foundry Breakout, allowing The Fury to be spawned, and Foundry completed.
Skills
The Black Beast is a dervish, but its only dervish skill is Eremite's Attack, which does almost nothing, since it has no feeder enchantment. Like almost all DoA foes, the Black Beast uses Enraged, and like various others, it also has Fingers of Chaos.
Touch of Aaaaarrrrrrggghhh
The Black Beast has its own unique monster skill, Touch of Aaaaarrrrrrggghhh. This sets the target's attributes to 0 for 20 seconds, and forces the target and another ally in earshot to shadowstep to each other's positions. The skill has a 2 second activation, and unlike other titans, the Black Beast is not immune to KD, so this can easily be rupted with YMLaD. The Touch only has a 10 second cooldown, so if the Black Beast doesn't die quickly, be prepared to maybe have to rupt it again. Be aware that despite the name, and the fact that it's a skill with touch range, it's technically not a touch skill, and can't be stopped by "Can't Touch This!".
