Supernova
Supernova was a divine skill that got reduced to the Legendary category and it had one of the worst cast times. However, Rina's damage with Supernova was prohibitive, it dealt 1000% fire damage over an area zone.
-200,000!
That's right, an entire area zone. The fire explosion from the sun's collision with the earth covered the entire Fleeting Forest, with not a wisp of heat escaping the 'boundaries' of the area zone.
She had slaughtered every player, since they had less than 20,000 HP on average. With 200,000 damage, Void Fodder and Void Monsters were killed without question.
After the sun landed on the ground, only 8 players were left standing.
Only the Void Killers and Void Destroyers remained, though their numbers had been largely reduced by Draco, Riveting Night and the core members of the Four Guilds before they had died.