In other words, he was a Specter Fiend assassin.
As Lu Bu'er continued to hammer and stab, slaughtering the third Jingjigui, the Dark Matter he had devoured was now enough to cover his entire right arm and shoulder, especially the scapula.
The Dark Matter armor had already sprouted menacing spines.
Luckily, his clothes were thick, so the newly-sprouted spines weren't very noticeable.
He had forcefully turned the tide of battle, allowing the others to catch their breath.
"Keep beating the drums!"
Having left these words behind, Lu Bu'er suddenly burst into a sprint.
The aged chieftain of the Departed Soul Clan quickly caught on and called his surviving tribespeople to pick up the hammers and gongs that had fallen to the ground, resuming that strange frequency once more.
"Quick, play the Departed Soul melody, or we're all going to die!"