Nuclear Energizer

Nuclear Energizer enters the battlefield with X Fuel counters, Y Unstable counters, and Z Utility counters, where Y is the amount of red mana spent on Nuclear Energizer and Z is the amount of white mana spent on Nuclear Energizer.
At the beginning of your untap step, if Nuclear Energizer is tapped, remove a fuel counter from this. If there are none, add a Unstable Counter.
If there are more Unstable counters than Utility counters, exile all non land permanents you control and all players take 10 damage.