As you begin casting this spell all sources of light within 200 feet of you dim as energy is gathered for this spell. Spell casters in the area around you can use an action their turn to provide power for this spell, by sacrificing a spell slot a bonus will be added to this spell. 1st through 3rd level spells increase the damage by 2d10 force, 4th through 5th level spells increase the damage by 2d10 and lower the casting time by 6 seconds, 6th through 7th spells increase the damage by 3d10 and lower the casting time by 6 seconds, an 8th level spell spells the damage by 4d10 and lower the casting time by 12 seconds (two rounds), and lastly a 9th level spell increase the damage by doubling the d10 rolled and lower the casting time by 30 seconds. Once fully activated the spell fires in a beam that carves through anything that is within the beam dealing 30d10 Force damage and a CON save for half. All those hit by the beam must make two additional CON saves the first is for those that failed the main CON save linked to the damage, if they fail a CON save they instantly drop to 1/4th health and are blinded for 10 minutes. The second CON save is linked to those that made the main save linked to the spell damage. They must make a standard CON save VS you spell save DC, on a fail they are instantly knocked prone and stunned for one turn.
Once the spell is cast the and if it was charged by another 9th level spell, the caster must make a CON save DC 10+ 5 for every 9th level spell slot sacrificed to the spell. If the save is failed the caster takes two levels of exhaustion and does not regain their 9th level spell slot after their next long rest.