Mastery Recovery stones

Cmrtnll

Hey everyone. I'm wondering if those Mastery Recovery thingies are somehow limited.
As in, are there only 5 I can ever use, total? Or can I buy more? Or do they recharge with time, like Duel Credits?
I couldn't find this anywhere else, so I'm asking here before I use them. I actually spent a lot of my points on those first few masteries, only realized now that it was a mistake.

BigMo

You can recover your masteries as many times as you want. It doesn't cost anything to recover anymore. You haven't had to use those recovery stones for a while. It only costs when you rebuild but it is free to recover masteries.