Einstein's Equation

Whenever you cast a spell, you may pay {x}. If
you do, create X 1/1 white and blue Photon
creature tokens with flying and haste that have "Sacrifice this creature: Add {e}."
At the beginning of your end step, if you control
seven or more Photons, you may transform
Einstein's Equation.
Time and space and gravitation have no separate existence from matter. -Albert Einstein