by DaviddesJ
Finite wrote:
That said, the absolutely simplest way would be to have Crystal Mastery return whatever crystals you had at some point in the turn but no longer have.
No, the absolutely simplest (and apparently correct) way is to spend crystals (and then, with Crystal Mastery, you get them back if you spent them). If you convert crystals to mana and then spend the mana you generated (as happens with Sacrifice), you don't get the crystals back, because you didn't spend them, you converted them.
Why some people want to make it more complicated than this, I have no idea.