Bombardment

You spend 1 hour creating a series of spectral ritual circle 150ft above the area of the spell, the amount of circles representing the level of the spell, you must be stood on solid ground for the entire casting time, and you must have a clear line of sight to the sky. During this 1 hour it is blatantly obvious both that you are casting the spell and where you are casting it from, as you trace a smaller version of the circle above you and the smell of brimstone fills the air, embers blow in the wind in the area where the spell is being cast and the temperature both around the caster and in the area within the radius of the spell, these effects are enough to cause any creatures that are unaware or asleep become aware of the spells casting. Once the spell has been finished casting, a column of fire 5ft in diameter descends from the sky, before a massive explosion detonates, causing all creatures inside to take 15d8 fire damage and 15d8 force damage, any damage done to structures is doubled.

For each level after 6th, the damage increases by 5d8 fire damage, and an additional 5d8 force damage, and the casting time increases by 30 minuets.

If this spells effect is replicated via another spell (such as with the Wish) of a higher level than 7th or ability, its casting time is an action.