“You impudent fool, how could I not know what mysterious techniques are?! They are techniques, and they are indeed… mysterious!”

“You call that ‘jinn’ powerful? It’s not nearly as strong as my mother’s mead!” or my preferred alternative:

“You call that ‘jinn’ powerful? It’s not nearly as strong as an archer’s mead!”

And if you want to get kinky:

“You call that ‘jinn’ powerful? It’s not nearly as strong as your mother’s milk!”

Maybe even

“You call that ‘jinn’ powerful? You should taste it together with tonic!”

You can drop the powerful if it doesn’t sound fitting, or replace it with another word. It sounds just as good without it at all:

“You call that ‘jinn’? You should taste it together with tonic!”

All I’m saying is that this joke has potential, use it. No pressure.