Challenge her to a fight

"I'm here to challenge you. I've heard you're quite the warrior." You tell her.

"Well I am that. What sort of a challenge?" She says, lowering her weapon.

"Unarmed combat."

She looks you up and down and tries not to laugh. "You wish to fight me?"

"I have bested all the rest Asgard has to offer, including the Mighty Thor himself." You convince her, as her expression turns from amusement to bemusement.

"That is most impressive for someone of your... humanity."

"The rules are simple, the winner is the first to make their opponent surrender. If you manage to defeat me, you will be known as the best fighter in all of Asgard, having done what your compatriots failed to do."

"Very well." She says, "Now I know what lies in it for me, but what is your motivation for winning?"