Apologies, it's been a while since I played and forgot some of the extra details.
As a really dumb fucking question for this sort of thing in general, (And I am a total rookie at these games) what if Energy/Mana cards came in a secondary deck that you could choose to draw from as an alternative source? This might allow for more flexible options, and reduce the need to mulligan. As for initial draws, you simply decide how many cards you want from each deck, then draw Energy, then Play cards. Does this already exist in some form?>>64783192
Because I'm trying to change that, and learn more about the game and the reasons behind the rules by engaging with the community. I can only garner so much by lurking, but I can garner a lot more by asking questions, making observations, and taking part in general.