Apocalypse EPIC Tier 3

You unleash destruction in a 1-mile-radius aura that is centered on you and moves with you. At the end of each of your turns, a 100-foot cube centered on a point of your choice within the affected area experiences an apocalyptic cataclysm. Creatures, objects, and structures within the affected area have their hit point maximums reduced by 50d6. An affected creature can attempt a Constitution saving throw, halving this reduction on a success. A creature that fails this saving throw by 5 or more instead has its hit point maximum reduced by 100d6. This reduction lasts until the spell ends. A creature, object, or structure that has its hit point maximum reduced to 0 in this manner collapses to ashes.

When you cast this spell as a ritual, the casting time is increased to 100 days. When you begin casting this spell as a ritual, you must designate a willing deity with a divine rank of greater deity or higher to provide the power behind the spell. Over the course of the spell’s casting, you must honor the sponsoring deity with ritualistic sacrifices, extravagant prayers, and other acts of faith that are appropriate to its portfolio. If the ritual is interrupted or fails during this time, both you and the sponsoring deity are destroyed utterly and cannot be restored to life by any means. When you finish casting the spell in this manner, the apocalypse begins. Seas boil, the ground splits open, volcanoes erupt, and the sky rains death. On initiative count 20 (losing initiative ties), everything on the plane has its hit point maximum reduced by 100d6. At the end of the spell’s duration, the plane explodes, and everything remaining on it is obliterated.