After the war of #Mahabharata,the Pandavas were cursed with Pitra dhroh, Guru dhroh, gotra dhroh. The only way out was Shiva (it is believed in all the yugas, once you get Shiva darshan, all your sins will be washed off instantly) n/1
Krishna himself was affected by these dhroh, but he couldnt step foot on the land of Shiva - Devbhoomi, so he requested Vasuki to carry him on his head
The Pandavas also set their journey to find Shiva
The legends of the 3 Pandavas is well known i.e.Yudhishtir, Arjun n Bheema n/2