Mono Black Control. 90% Mythic and affordable

No BS deck, get 6 lands ASAP using treasures and wipe the board against aggro decks. I have found Sorin to be more consistent than Onyx, less risk and good reward (13 dmg + heal in 3 to 4 turns after dropping). 

Valki is a good early drop and a Tibalt a devastating win condition in the late game. Red mana can be obtained from the vast amount of treasures. 

Duress is optional, it has saved me in a pinch, good combo with Inscription of Ruin

Add more Hive of the Eye Tyrant if you want. I have found it hard to ramp up mana when it enters tapped.

Westgate Regent is also optional, you can replace it with a planeswalker. It\’s a good card to drop against removal decks cuz of the powerful Ward.

It took me to 90% Mythic with a ~70% winrate.