Cirali superweapon

The Cirali superweapon was a radioactive weapon utilizing the loss of molecular cohesion in ozone molecules thus causing the ozone layer to dissipate on a continental level.

When used on Valina it caused a massive ozone hole over 12 million km2in size. This subsequently caused tons of UV radiation to flood into the planet, eradicating all life in minutes. Valina was able to save 10s of millions of people to launch a counter act.

The Cirali didn't fully except in creating the weapon, but new it was the greater good for ending the two species centuries long war. In total the Cirali calculated over 8,300,000,000 casualties within the first 6 minutes, although their calculations did leave a billion or so people alive, they had no plan to defend what came.

7 years after the destruction off the Valinan ecosystem, the Valina launched a weapon which they deemed the Valinan hammer. A weapon of such destruction it would've obliterated Cirali if the right countermeasures weren't taken to decrease it's yield.

The Cirali and their ancient conflict were uncovered when a drifting Cirali Ark was discovered in Sector 464 in 2475 by the USS Inventum.