Diluvial Torrent

A spell lost to the ages, Diluvial Torrent is a 10th level Epic Magic inaccessible to mortals by divine law.

Upon the ring of a silver gong, a massive vertical column of arcane water falls from the heavens atop the caster, both crushing the caster and unendingly drowning their surroundings. A 20-foot-radius, 100-foot-high cylinder of water is dropped from a height 200 feet. All creatures in the immediate area must make a Strength saving throw. A creature takes 30d6 bludgeoning damage and 30d6 force damage on a failed save, or half as much damage on a successful one.

Targets reduced to 0 hit points by this damage are disintegrated. 

The spell confers the caster immunity against all damage except force damage during the spell's casting.

The water from Diluvial Torrent spreads in a 1500-foot radius from the caster at a rate of 50-feet per round. The first 300-feet of affected area behaves like the tsunami spell, creating a wall of water 70-feet high. Beyond this point the water will behave like the tidal wave spell, creating a 10-foot wave. These affects lasts for 3 minutes as the water disperses. The arcane water cannot be dispelled by an effect of 9th level or lower.

Magical effects within the affected area are dispelled as if within an antimagic field. The area itself becomes a permanent spot of dead magic as the water crushes the Weave itself. Magical matter, force effects, and energy fields are simply destroyed.