They will need both. Looking at the chart above for the Legendary, to craft 1 copy of the card you need 3 things:
a) 50k Aura
b) 40k Iron
c) 37,500 Cinder
And on the common card, if you want a level 4, then you need 30 copies and your math is correct on both!
If you have any more questions, then let me know @hobotortoise and thrilled you are looking forward to the release!
Yikes the Legendary is super out of budget for me then hahaha. But thanks for the explanation!
And brilliant. Would love the level 5 water card but again that brings me out of budget haha.
Thanks again!
well the good thing is you can start at the level you are comfortable with, and then add to it over time. I plan on having a few level 3 and working to level 5 common cards myself. And thank you @hobotortoise :)