The Great Cleansing is an event that Malefor speaks of, in The Legend of Spyro: Dawn of the Dragon. The ancient golems of the deep and the Destroyer were summoned for this spectacle of armageddon. The Great Cleansing literally purges the world by destroying everything, including the earth itself, making it truly the end of the world.

Just as Spyro and Cynder began their battle with Malefor to stop him from destroying the world, the Great Cleasning was triggered when the Destroyer managed to throw itself into the volcano from whence it came. After Malefor's defeat, Spyro used his power to stop the The Great Cleansing and reconstruct the shattering world.

Spyro - Sparx - Cynder - Hunter - Malefor - Ignitus - Volteer - Terrador - Cyril - Chronicler
Prowlus - Meadow - Hermit - Mason
Catacombs - Twilight Falls - Valley of Avalar - Warfang - Ruins of Warfang - Attack of the Golem
The Dam - Burned Lands - Floating Islands - Malefor's Lair
Grublins - Grublin Flies -Hero Grublins - Orcs - Hero Orcs
Trolls - Bowman Orcs - Wyverns - Shadow Apes

Golem - Destroyer - Malefor

Fire - Electricity - Ice - Earth - Aether - Poison - Fear - Wind - Shadow
Dragons - Grublins - Spirit Gems - Armor - Green Chains - Elite Enemies