I finished the previous Mastery at level 46
Braids, Arisen Nightmare At the beginning of your end step, you may sacrifice an artifact, creature, enchantment, land, or planeswalker
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Adeline, Resplendent Cathar: The ability that defines Adeline's power works in all zones, not just the battlefield
Now enjoy a strange epilogue, features characters so obscure, I didnt even bother mentioning them in the walkthrough
This was a card I made right after I discovered Magic Set Editor, and it shows
You lose some lifegain, but honestly this looks like a significant upgrade to me: being able to play an additional land per turn is well worth the one extra mana to cast