Trollhammaren!

[The Sixth Wizard]

Yes, its true. And he may have actually killed all those trolls. After all, Morgoth punished Hurin very severely (maybe more than anyone else). There must have been a reason (And I'm sure there were others who killed 70+ orcs in their lifetime).

Well, the punishment was due to Hurin's refusal to reveal Gondolin's location to Morgoth, coupled with the overall defiance thing that no-one else had done face to face in Middle Earth (Feanor did it in Aman).

But the magnitude of the feat (Hurin must have been tortured as well as just interrogated in Angband) makes him more than capable of such a "small" achievement as battle prowess.