there tuor slew othrod a lord of the orcs cleaving his helm , and balcmeg he hewed asunder , and lug he smote with his axe that his limbs were cut from beneath him at the knee , but ecthelion shore through two captains of the goblins at a sweep and cleft the head of orcobal their chiefest champion to his teeth ; and by reason of the great doughtiness of those two lords they came even unto the balrogs .