By pairing Grinning Ignus with Training Grounds, we completely flip the mana math on the Ignus's self-bounce ability, reducing its activation cost from {R} down to just {1}. Planar Gate steps in to slash the casting cost of Grinning Ignus by {2}, making it free to recast since its base cost is only {R}. Finally, Stonework Packbeast acts as our color filter, converting the excess colorless mana generated by the Ignus loop into any color we desire. The result is an endless cascade of creature enters-and-leaves-the-battlefield triggers, fueling infinite storm count and boundless mana of any color.