OKAY SO LET ME START THIS OFF BY SAYING THIS IS PROBABLY NOT A GREAT DECK.
But, lemme break it down.
So, the deck kinda relies on one really important thing; randomness.
You're prepared for EVERY card off the top from birthrite. Even if its not helping you, its helping you. Where's your opponent is not prepared. They might hit off a spell too early, or play a creature they wasnt ready to play. Maybe wipe their own board? Who knows. Arcane Restraint in the market is CLUTCH. Play a restraint on another control deck, birthrite makes them play a spell off the top, they're basically locked out of a turn. Idk, the deck is fun and surprisingly consistent. It's not hard to dig for birthrite, and it's easy to slam an arcanum and run the game out by sols resting everything. If you got the stuff, try it out. Personally I just crafted all of the legendaries just to try something fun out and I'm not disappointed.
Update: Decks fairly competitive and turns out theres a huge bug in the game that I found using this deck. If you have a site in play and hit another site off birthright, you can use both, and you can use any mode even if you've used it previously. Oops?