Thorny Cyst in Genshin Impact: How to Find and Defeat

In Genshin Impact Thorny Cyst is a special enemy that can be encountered in the polluted pond located in the cave on the Eastern Slope of Mon Esus. Having dealt with it, you will unlock the “Through the Barriers of Time” achievement, and will also be able to gain access to a hydroculus, a luxurious chest and a mysterious ore. In this guide, we will show its location and tell you how to destroy it.

How to purify the water in the cave of the Eastern slope of Mon Esus

Where is the Thorny Cyst?

Travel to the teleporter on the Eastern slope of Mon Esus, and then start walking south towards the huge waterfall. Approach him, and then dive under the water near him. There you will find an entrance to a cave - swim into it.

After diving down, swim forward through the tunnel until you reach a dead end with the Scarlet Prankster (looks like a red flower). Take the power from the xenochrome jellyfish (click on it with LMB), and then swim up to the wall and release a bomb at it by holding down the “E” key. Click on the E-shka again to detonate the mine and clear your way.

Move on and you will soon find yourself in a spacious underwater cave with a Spiked Bubble. The health of your active character will begin to rapidly decline due to contaminated water.

How to destroy the Thorny Cyst

First of all, we advise you to prepare for battle with this enemy. Take the hero with the largest reserve of maximum HP so that he can survive being in dirty water and enemy attacks longer.

Be sure to prepare as many dishes as possible to restore your health and make NRE an active gadget - you will have to use it often. We also recommend taking Lynette into your team (will simplify the search for recovery spheres), Nevillet (will speed up movement under water) and Freminet (increase water endurance).

As for the battle with the Spiked Bubble itself, you will need the xenochrome jellyfish skill, so take it (the desired creature swims in the same cave). With this ability, you can destroy glowing nodes on spikes, thereby making the enemy vulnerable to normal attacks.

So, destroy the first 3 nodes (can appear on any spikes) using the jellyfish ability. After this, the enemy will have a health bar, so start releasing bombs towards the sphere. When his life bar drops to around 70%, it will dim and you will be unable to damage him again.

Destroy 4 more glowing nodes to make it possible to attack the ball itself. Once his health drops below 50%, you will need to destroy the nodes again, but now the spikes will disappear and appear, so you will have to noticeably speed up in order to throw a bomb at them.

Having dealt with the last two spikes, finish off the sphere. Note that you can ignore ordinary mobs, since they will all die as soon as you deal with the boss. In its place, by the way, there will be a Mysterious Ore.

Even lower is a luxurious chest. Behind the rock column a Hydroculus can be found. Let’s add that immediately after killing an enemy you will unlock the “Through the Barriers of Time” trophy, which gives you 5 primogems.