The Horse Gu NPC quest line in Black Myth: Wukong is one of the most intricate and easily missable side quests in the game. Missing even one step locks you out of completing the quest until a new playthrough. This guide will walk you through every interaction you need to make, step-by-step, to unlock the Dark Thunder spell and the Horse Gu transformation.

Important Tips Before You Start

• Consistency is Key: You must speak to the Horse Gu NPC in every chapter from Chapter 1 to Chapter 5.
• Exhaust All Dialogue: Make sure to talk to him repeatedly until he starts repeating himself.

Chapter-by-Chapter Walkthrough

Chapter 1: Black Wind Mountain Bamboo Grove

• Location: Back Hills Shrine.
• Directions: Head left into the cave nearby and speak to the Horse Gu NPC until he has no new dialogue.

Chapter 2: Sandgate Village

• Location: Village Entrance.
• Directions: Cross the bridge, turn right, and head up the hill to find him leaning against a pillar. Exhaust all dialogue.

Chapter 3: New Thunderclap Temple

• Location: Temple Entrance.
• Directions: Move through the temple, exit left, and head upstairs to find the Horse Gu NPC near a pillar. Speak until he repeats himself.

Chapter 4: Webb Hollow

• Location: Bone Vault.
• Directions: Drop into the pit, follow the left path, and hit the large sack to free the Horse Gu NPC. Speak to him fully.

Chapter 5: Flaming Mountains – Furnace Valley

• Location: Valley Entrance.
• Directions: Follow the cliff edge to find a cart surrounded by enemies. Defeat them and exhaust the dialogue with the Horse Gu NPC.

Final Step – Chapter 6

• Location: Return to the cart in Furnace Valley.
• Task: Defeat the enemies, pull the string on the cart again.
• Rewards: Unlocks the Dark Thunder spell and the Horse Gu transformation.

Summary

Following these steps will ensure you complete the Horse Gu NPC quest line successfully. Missing a single step will lock you out of the rewards, so follow this guide closely. Enjoy your new transformation and the power of Dark Thunder!