Full Bellies Fight Better
The quest is unlocked after completing The Future of Hyrule scenario.
"The owner of the butcher shop in Hateno Village, deeply moved when he heard about the volunteer army, wants to send the troops some tasty cuts. Help fill up his larder."
"Link and the butcher brought the volunteer army a heap of tasty meats. Apparently he was a talented soldier in his youth. He taught all of the fighters his two-handed sword technique."
- Two-Handed Weapon: Enhanced Ability