Nova Blast

As an additional cost to cast this spell, sacrifice a
Toa creature you control.
Exile all nonland permanents.
Even as he gloats over his triumph, I am summoning
every last bit of moisture from the air for hundreds of
kios around. I am merging it together, bending it to my
will, preparing to unleash all my elemental power in
one single explosion of force. - Toa Gali