Ars Magia

(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.)

As an additional cost to cast this spell, sacrifice a creature.

This spell can't be countered.

Destroy all permanents your opponents control.

"It's the spell that melts the earth and vaporizes the
blood of all living creatures. The ancient forbidden
spell, Ars Magia!" - Mavis Vermillion