Mahābaleśvara

Syncretic forces produced stories in which the two deities were shown in cooperative relationships and combined forms. Harihara is a the name of a combined deity form of both Vishnu (Hari) and Shiva (Hara). This dual form, which is also called Harirudra, is mentioned in the Mahabharata. An example of a collaboration story is one given to explain Shiva's epithet Mahābaleśvara, "Lord of Great Strength" (Maha = great, Bala = strength, Īśvara = Lord). This name refers to story in which Rāvaṇa was given a linga as a boon by Shiva on the condition that he carry it always. During his travels, he stopped near the present Deoghar in Bihar to purify himself and asked Narada a devotee of Vishnu in the guise of a Brahmin to hold the linga for him, but after some time Narada put it down on the ground and vanished. When Ravana returned, he could not move the linga, and it is said to remain there ever since.

niggaaa waaaat...