The only way to test that is to try out... and if you manage to learn a second, I can see if I can learn water from you in return.

[Then they can both be double elementalists and water and metal proved to be a ather scary combination already.]

We should probably try that in Liminal Space though... just in case. [This was a superhero Jaunt, but it might still be too odd for the natives to see someone teach something like that.] We'd have six hours between portals, if you think we can spare that much away from here... unless you know portals as well, then the time can be shorter too.