Shields

"What kind of revenge do you want?"

"What do you mean?"

"If you just want to kill them, you don't have to come to me. But if you want to kill them without anyone knowing and with a sense of mystery left behind, I could help you a bit."

"No, no. No killing. If the clan finds out, that I killed my peers even before my previous generation heir selection was not over, then I would be dead."

Sam shrugged and said. 

"Okay, that is just one option anyway, there are others.

If you want to take revenge on the business side of things, there are a few methods. You can penetrate the market and take away their share of customer base, you can destroy their business without any involvement in the market too. 

If you ask me, these two are the best options. I would proceed with either of those two."

"What about others?"

"they involve some killing and smearing the reputation and a lot more deeds that accumulate to kill their business."