In FernGully : The Last Rainforest , human extinction was caused by an attack from Hexxus .
She believes humans dwell on Mount Warning , but the wise sprite of the forest and Crysta 's motherly figure , Magi , says humans are now extinct , driven away by Hexxus , the spirit of destruction and all that is toxic to nature , never to return and presumed dead ; Hexxus was defeated by the fairies and imprisoned inside a tree .
FernGully-COLON- The Last Rainforest