If you win the flip, exile the chosen creature
I like the mechanic, though Im skeptical if scrying really needs to become even more powerful
When they lose life, Exquisite Blood will trigger and cause you to gain life equal to the amount they lost
You can even include Auras into the mix to give Michonne, Ruthless Survivor even better stats to keep it even more protected
With Tianas ability, Special Reservation, anytime one of your characters is challenged while Tiana is exerted, the challenging character gets -3 strength unless your opponent pays three ink
The catch here is that you can just float a ton of mana, resolve Upheaval, then use what mana you have left to deploy mana rocks and threats