Fang of Watatsumi is part of The Moon-Bathed Deep subquest in Genshin Impact 2.1. There are multiple sub-quests in the Moon-Bathed Deep World Quests. These multiple sub-quests tell about the mythology of Watatsumi island and its people’s origins. This walkthrough demonstrates how to complete the Fang of Watatsumi to collect Spirit Pearl
To get all the subquest you’ll need to speak with Tsuyoko, the Shrine Maiden of the Sangonomiya Shrine. First, teleport to the Statue of the Seven on Watatsumi Island and head up the hill to the West. You’ll see a ruined building and Tsuyoko standing off to the right. Speak with Tsuyoko to learn that Watatsumi Island is turning into a desert. To save the Watatsumi Island a sacred ritual needs to be done between the Sangonomiya and Enkanomiya.
The first part of this quest is to open the path to Enkanomiya, to do this you need to break the five seals on Watatsumi Island. You will automatically get four quests for the Eye, Fang, Fin, and Tail of Watatsumi after speaking with Tsuyoko. On completing these four quests you will get access to the Heart of Watatsumi sub-quest.
Fang of Watatsumi
Go to the “Fang”
As you start the subquest ‘Fang of Watatsumi’, your first goal will be to go to the island where you can break the first seal (out of five) to enter Enkanomiya. Head to the location of the sealed shrine as marked on the map. Beside the shrine a stone slab that read –
“…To provoke battle, to defend, and end them quickly, and thus take unto oneself the spoils – ‘tis the way fo Watatsumi, marked in tooth and claw…”
Protect the Ley Line Monolith
Next, interact with the Ley Line Monolith crystal just down the hill. As you interact with the Ley Line Monolith, a few more purple color Monolith crystal spawns nearby.
Here you’ll need to fight off a few rounds of enemies while also protecting the Monolith. Enemies like Hilichurls, Samechurls, and Samurai will keep on spawning to destroy the Monolith. The basis of the challenge is in lasting the full 5 minutes of combat and protect the Ley Line Monolith. Game screen display Ley Line Monolith’s Remaining HP and Time Remaining in combat.
Obtain the Spirit Pearl
After successfully defending the Ley Line Monolith for five minutes, head back uphill to the sealed shrine to collect Spirit Pearl.