The Ten-necked Ravana (successively) assumed the shapes of a tiger, a boar, a cloud, a hill, the ocean, a tree, a Yaksa and a Daitya.
व्याघ्रो वराहो जीमूतः पर्वतः सागरो दुमः। यक्षो दैत्यस्वरूपी च सोऽदृश्यत दशाननः॥