Dirtflap's Revenge

Enter Castle Nathria on Normal difficulty or higher. This achievement can be completed solo at max level.

From Sludgefist's room, exit through the right door and head down the corridor — Dirtflap is an imp NPC hiding at the end of that hall past the stairs. Be aware there is an assassin mob in that area. Talk to Dirtflap and he will run to Sludgefist's room and perch on a pillar.

Place a raid marker on Dirtflap so you can track which pillar he moves to after each collision. His pillar choices can be erratic, so tracking him visually is important.

Pull Sludgefist but avoid dealing heavy damage to him. Do NOT tank him in the middle of the four pillars, as he may destroy two pillars simultaneously and cause Dirtflap to fly away, resetting your progress.

Position yourself between Sludgefist and whichever pillar Dirtflap is currently perched on. When Sludgefist fixates on you and charges, he will destroy that pillar. Position him toward the outer edge of the pillar so that if his charge direction is slightly off, he still connects. After each successful collision, Dirtflap will fly to the next pillar — repeat this process for all pillars.

Sludgefist's Destructive Stomp ability also destroys pillars, but pillars destroyed by this ability do NOT count toward the achievement. Only pillars destroyed by his charge count, so avoid triggering stomp-based pillar destruction.

After Sludgefist has collided with pillars in Dirtflap's preferred order, defeat him to earn the achievement. Check your Achievement Tracker — it will turn from red to white as each criterion is satisfied.