After learning that spells exiled by Kaho, Minano Historian can only be cast once, I had to revamp the deck. Kaho, Minano Historian is still extremely helpful to ensure that you will have the right instants for the rest of the combos.
Training Grounds, Pyromancer's Ascension, and Manamorphose are the cornerstones of this deck.
There are two really great combos in this deck.
All require Manamorphose. This can be hard cast, or cast with the assistance of Kaho, Minamo Historian.
With Training Grounds, Echo Mage can be infinite;y leveled up and produce infinite mana, and provide infinite draw if equiped with Freed from the Real. Turn 5 win.
Izzet Guildmage provides a much simpler infinite draw, infinite mana combo, requiring only Training Grounds. Turn 4 win.
Coupled Pyromancer's Ascension this allows an infinite bombardment of Cruel Ultimatums.
This deck is very playable in multiperson games.