Izzet Giga-Coil

{t}: Place a charge counter on Izzet Giga-Coil, then add X mana in any combination of red or blue mana to your mana pool, where "X" is the number of charge counters on Izzet Giga-Coil.
Discard a red or blue instant or sorcery: untap Izzet Giga-Coil.
In theory, just a single coil from the Izzet guild could power all of Ravnica. But somehow Ral claims that one is never enough