You Made Me Bleed My Own Blood

Located in The Thunder Forges, right down the central stairs leading to the Throne of Thunder.

Periodically, you get pulled to one of the four cauldrons in each corner of his platform, and then several [npc=69436] spawn. When they reach him, they give him the buff [spell=137174] which heals him. By not killing any bloods, you are dragging the fight out, but this was easily two-mannable. Just don't AoE, stay out of the [spell=140550] to avoid taking unnecessary damage, and you should be good.

This line is actually from the classic Simpsons episode 'Bart the General'. When Bart retaliates against Nelson, blood drips from Nelson's nose, prompting him to say that line.

To do more damage to Fleshcrafter Hoku i suggest killing [npc=69216] for stacking debuff [spell=136842] (max 10 stacks, lasts 2min)
made this achievement easier.