The two UFC stars will battle at the Brisbane Entertainment Centre in front of a crowd predicted to sell out.
A win for either could see them surge back into the heavyweight title picture.
Hunt said he was content if his life ended in the cage but wasn't sure if Mir was.
"Good, break my legs, at least they will be broken at work," Hunt said.
"I am ready to die in there. I am ready to give my life in there to be the best fighter on the planet and I don't know if he is.
"That is the only way to feel. I feel I am the best fighter in the world and I am ready to go that much further than he is on Sunday.
"I didn't get this far worrying about what people say.
"It is an idle threat. That's his game.
"I'll show him my respect on Sunday when I am punching his face in.
"If I end it there that's what it is and if he's going to break my legs then break them."
The two fighters will square off for the first time on Saturday at the weigh-ins for UFC Brisbane event.
- news.com.au