like could he mix airbending and waterbending to get ice breath, airbending and firebending to have hot breath (but not fire) firebending and earthbending to make molten rock etc.

Quick answer: Yes.

Not-So-Quick-Answer-Yet-Quite-Quick-Anyway: he has already done the breath thing, and we've seen roku bend the lava a bit, so yes.


If you have another question, please ask it in the question & answer thread that's pinned.

Comes with being the Avatar. Using more than one element at once, n all that. He's already demonstrated it in and out of the Avatar State personally.

thanks.