 So he seized and imprisoned them on the corners of the island but still they sang together, so now he was crazed by rage and went to all corners and struck each sister, one by one.After Terra's voice ceased, the sorcerer not realizing what he had done, for in the center of the island slept a vile and hideous creature that had slept on soothed by the sister's singing, when the singing stopped, then it awoke enraged and lay waste to the island, fouling the stream and crushing the smaller beasts and cracking the very rock upon which the island rested causing the island to sink beneath the waves, but the sorcerer escaped to conquer new lands.Years later, in his attempts to conquer Deltora, the Shadow Lord created creatures he ironically dubbed 'The Four Sisters' in mocking tribute to the originals.