DESCRIPTION
Haven't seen anybody do this deck yet. I would say, it's not competitive as is or ever really, but it's really fun to play. The three important things are the Reassembling Skeletons, Ajani's Welcome, and Desecrated tomb. Start the game with at least 2 of these puzzle pieces and decent land. Mulligans are really important, cause when the deck doesn't work, it really doesn't work.
The sideboard isn't a traditional sideboard. Because of mastermind's acquisition, it's used as a "hail mary" or "icing on the cake" depending on situation. Basically, MA into deck if you need one of the 3 puzzle pieces or a harpy, if you have all 4 of those, i generally MA to sideboard Divine Visitation...but it's all very situational.
Have fun