Argue for the tactical strength an alliance would bring

"Chieftain, there's a war coming. If you were to ally with us, I can promise your guranteed survival. The Blackfury Tribe would grow exponentially, gaining strength over the entire Spine and soon spreading to take back the land that was once yours!"

"Bah, you speak of the dreams of the simplest of fools! I've no aspiration to lead my people back to the slavery of working under you, and I don't need to be told when I've some cock-sucking slut trying to convince me over to their side with your dirty tricks. You fucking sicken me, and I won't deal with it!"

"Well, that's a shame," you sigh. "Well, I'm aware that my Orcish customs, I'm allowed to challenge you to a dual to the ****. Let's do that, shall we?"

"Ha! I'll happily tear your skull apart in the arena. When, then?"

"I'm already shit sick of the stench-ridden air here. Let's do it now. Hopefully, your replacement is your better."