During the casting time of this spell, you fall in a deep meditative state that of which the caster cannot break out of unless the ritual is intervened by an external force, like that of the caster being moved or killed alongside the caster’s body still being affected by that of aging, hunger, and dehydration if the caster requires such needs. If the casting time of 666 years is not broken, then the spell will be fired off instantly when finished.

When the spell is casted, the Universe Implodes in onto itself, and the DM loses control of everything and a New DM must take their place, starting a brand-new world in the process. Creating all-new Character and NPC with only the one that casts the spell remembering the old universe, but inhabiting a new body and all powers being lost, but still able to be regained.

Additionally, you can add 666 years of casting time and an additional 666 GP worth of glitter to cast this as a 10th level spell, which will allow you in the next campaign to choose to become Asmodeus and gain this spell as a cantrip until killed in the 9th Layer of Hell or if this spell is casted again.

As a cantrip, It will cast instantaneously and does not require any of the necessary material*, but will never be able to gain the abilities of its 10 level counterpart and you can no longer cast this spell or become Asmodeus ever again after casting it. Any other effect not listed here consists of all the same effects as the standard 9 level cast.

(NOTE- This spell is highly restrictive and broken. If you are a DM, take inputting this into your campaign with heavy caution and consider that this is meant to be a campaign ender, Thank you!)

* - (666 GP worth of glitter)  * - ( 5,834,160 hours is 666 years)                                                                                                  (Credit to KrazyKarl's original post and for giving me this Great Idea!)