Amberser still used illusions to wrap himself up, hiding on the side to watch the commotion.
From the moment Harvey arrogantly won money to the current chaos, Amberser had seen it all.
The lad has made progress, but not much.
If it had been Amberser, he wouldn't even need to involve a third party to cause trouble. If he couldn't beat the Orc, couldn't he incite them to fight among themselves? With an understanding of the Orcs' traditions, one would know that matriarchal tribes are despised by the current orthodox Orcs; there would surely be some Orcs within the Sawtooth Blade's tribe discontented with female leadership.
Spend some time investigating, then simply instigate a few times, luring those brainless Orcs into poisonous schemes and deception, and they would start fighting among themselves.
With even more cunning words, one could completely clear oneself of any involvement.