If The Formula would be depleted, deplete another card instead.
Your next attack banishes cards instead of depleting them.
Your next 2 attacks are a critical strike.
Your next 3 attacks deals double damage.
Your next 4 attacks are unstoppable.
The Formula exists beyond reality's walls, held at bay until his minions undermine them from within and grant him access. Then he barges into our world as a raging beast -- swift, strong, and near invincible.
Years ago, The Crime Blotter and Shimmerstorm learned that the best defense -- perhaps the only sure protection against him -- was to prevent The Formula from ever being summoned. Now that's failed, and there isn't a single 'Plan B' which seems adequate to stop him.