Actually the most powerful character in mahabharata after krishna was barbarik (the grandson of bheema,son of ghatotkach and maurvi),he had three arrows with which he could destroy whole universe,the first arrow use to chase the target,second to mark him and third to kill him,acc. To legend,before kurukshetra war Lord krishna asked warriors from both sides how much time would they take to finish the war on their own,duryodhana said he can finish this in 45 days,bheem said 40 bhishma and drona said 32 and 35 respectively ;karna arjuna said 30 and 27 respectively;when Lord krishna asked barbarik he laughed,amused Lord krishna asked what's the matter he said I will shot one arrow and it can kill both kaurvas and pandavas army excluding u and bhishma,everybody was taken a back,Lord Krishna asked him to prove it ,he said you can test me ;he showed him a tree and which had the exact no of leaves ,as mentioned in mahabharata and told him to shot all the leaves with a single arrow,but Lord krishna pluck one leaf and hide it beneath his foot,when barbarik used his arrow it teared all the leaves of the tree and then started hovering over Lord krishna ' s feet and fell near it ,then he asked krishna to lift his foot and when he raised it even that leaf was torn apart,but the thing was he had this condition that whenever an army starts losing he will join it,that way whole armies will be destroyed except him,krishna and bhishma,so Lord krishna tricked him and said I have heard that mighty warriors are mighty givers as well,he said yes so ask for anything.,he said this war wants sacrifice of veer and their are 3 veers in it myself,arjun and u,he said why don't both u and arjuna gives sacrifice,krishna replies that arjuna has sworn to kill karna and I have sworn to be his charioteer,so we can't,to this barbarik replied oh my lord I just wanted to get moksha from ur hand that's why I did all this,but I also want to see this war,krishna said so be it,he cut his head and that head was placed so that he can watch the war,he was the one who made pandavas realised that it was the power of lord krishna that slayed each and every kuru warrior,he is also known as khatu shyam,he along with krishna and hanuman were the only 3 mahamaharathi ' s(equal to 24 atimaharathi) in mahabharata whereas karna arjuna bhishma drona and abhimanyu were atimaharathi(equal to 12 maharathi),while four pandavas,duryodhana,ashwatthama,shalya and kripacharya were maharathi(equal to 60000 warriors) and 99 kaurvas ;satyaki drupada,virat,shakuni,Uttar,bhurishrvas,brihadbal,bhagdatt,yuyutsu,ghatotkach,kritverman ,shakuni,shrutayudh,upapandavas and chekitan were atimaharathi(equal to 10000 warrior)
sent from dil se