DESCRIPTION
My Ponza build is able to beat MUC as it is heavy on Genjus. More over Boseiju is a wonderful card in order to destroy the MUC's lands. IMO Boil is currently too much risky because of Spectral Shift. All blue mages play 3 or 4 Shifts in their sideboard.
Hammer of Bogardan is both an additionnal win condition and a good threat against MUC.
You must understand my maindeck Flamebreak : this card could really help you in dangerous situations like Troll Ascetic or many creatures or tokens. More over it could end the game by dealing 3 damages to your opponent.
This build is cool. Test it!