Gokarn's Atma-Ling
Ravan received an invincible atma-ling from Shivji, which he could not ground. Deities sought Vishnu's help, who advised them to approach Ganesh. Ganesh, disguised as a boy, tricked Ravan into grounding the atma-ling at Gokarn. The sacred ling lost its power, and Ravan departed for Lanka dejected. This act by Ganesh, the obstacle remover, saved the world from Ravan's ambition.