Tracie R
If it's heads, that would count as 20 for the replaced d20 roll, which would count as heads for the originally replaced coin flip
Mirko, Obsessive Theorist Mirko also lets you cheat on the cost of spells, but instead of instants, its creatures, and instead of blindly milling yourself, you get to surveil cards into your graveyard
Despite the high cost of these cards, buying an expensive single is still often more cost-effective than buying packs until you pull the card you want
That would be well worth running Corporeal Projection as a janky double flicker effect, but with overload, this doubles as a potent finisher
White-Black Life Gain Not only does life gain help you outlast your opponents for long enough to cast massive creatures, but it can also be spun into a defensive tool