Ravana’s sword. After getting a boon from Brahma, Ravana set about conquering the worlds. He finally reached Kailash and was stopped by Nandikesha. Ravana said he would uproot the whole mountain and throw Nandi’s master away. He kept all of his 20 hands under the mountain and shook it. Parvati was frightened and hurried towards Shiva. Shiva realised what was happening with his divine sight and he pushed the mountain downwards. Ravana’s fingers were crushed and he couldn’t take his hands away. He prayed to Shiva for a thousand years. Shiva finally appeared, blessed him and gave him the sword Chandrahasa and it won him many battles as per Uttararamayana.