Eidolon hunts: Teralyst, Gantulyst and Hydrolyst

Every night, huge Sentient creatures rise from the lakes on the Plains of Eidolon outside Cetus. These Eidolons are tough, but they drop valuable Arcanes and shards you can turn into Focus. There are three tiers, and you can hunt all of them one after another in a single night.

The key terms in short:

Eidolon

A shattered, half-dead Sentient. The Plains have three of them: Teralyst, Gantulyst and Hydrolyst.

Operator

Your own character who controls the Warframe. Only the Operator can break an Eidolon’s shield.

Amp

Your Operator’s weapon. It deals Void damage, which you need against Eidolon shields.

Synovia

The glowing joints of an Eidolon. These are its weak points that you have to destroy.

Eidolon Lure

A Grineer device you hack and charge with Vomvalyst energy. Charged Lures hold the Eidolon in place and allow a capture.

Vomvalyst

Small floating Sentients around the Eidolon. Their energy charges the Lures, but they can also heal the Eidolon.

Focus

Your Operator’s experience. You spend it to unlock abilities in the Focus schools.

1. 01

   Unlock Cetus

   You reach the Plains of Eidolon through Cetus on Earth. Both nodes open after the quest “Vor’s Prize”.

2. 02

   Finish “The Second Dream”

   This quest introduces your Operator.

3. 03

   Finish “The War Within”

   Afterwards your Operator can actually fight. Without it you have no way to break an Eidolon’s shield.

4. 04

   Get your first Amp

   After “Saya’s Vigil” and “The War Within”, a hidden door opens in Cetus behind Konzu’s bounty board. The Quills (Onkko) give you your first Amp there.

5. 05

   Build a better Amp

   The first Amp is very weak. Rank up with the Quills and build a stronger one soon, or breaking shields takes forever.

• A full cycle takes about 150 minutes: 100 minutes of day and 50 minutes of night.
• When night falls, the Eidolon Teralyst rises from a lake. A blue pillar of light shows where it is.
• At night the Eidolons charge the water with energy. Stepping in gives you a Magnetic proc and drains energy.
• At sunrise, every Eidolon still alive walks to the nearest lake and vanishes. All Lures destroy themselves too.

1. 01

   Prepare Lures

   At night, Eidolon Lures stand near the Grineer camps. Damage one until it shuts down, then hack it and it follows you. Each Lure needs three charges: it absorbs Vomvalysts in their ghost form, or you carry their energy orbs to it.

2. 02

   Break the shield

   The Eidolon’s shield only takes Void damage. Switch to your Operator and shoot with your Amp until the shield is gone.

3. 03

   Destroy the Synovia

   Now the joints are vulnerable. Destroy one with your weapons. The Eidolon answers with an energy wave that applies Magnetic.

4. 04

   Stop the teleport

   Without a charged Lure, the Eidolon teleports away and recovers 75% of its shield. With at least one charged Lure nearby it stays put and only gets 50% back.

5. 05

   Stop the healing

   Once all Synovia are gone, the Eidolon calls in Vomvalysts. Each one that reaches it heals 5%. Shoot them down with your Operator.

6. 06

   Kill or capture

   Then the whole body is vulnerable. With enough charged Lures, the Eidolon is captured instead of killed, which gives far more loot.

The Eidolons build on each other. You summon the Gantulyst and Hydrolyst yourself by offering a shard at the Eidolon shrine in the middle of the big lake.

Eidolon	How it appears	Synovia	Lures to capture
Eidolon Teralyst	Shows up on its own at night	4	2
Eidolon Gantulyst	Brilliant Eidolon Shard at the shrine after capturing the Teralyst	6	3
Eidolon Hydrolyst	Radiant Eidolon Shard at the shrine after capturing the Gantulyst	6	3

• The Gantulyst raises an orange dome. Shots from outside are blocked, and pulses hurt everything outside it. Keep your Lures close to it.
• The Hydrolyst calls down thunderstorms with lightning and opens purple portals that spawn stronger Vomvalysts.
• Capturing all three in one night is what the community calls a “Tridolon” run.

Every Eidolon drops one Arcane when defeated. Captured Eidolons roll on a bigger table with rare Arcanes. On top of that you get shards and Sentient Cores.

Eidolon	Always	Only when captured	Notable Arcanes
Teralyst	1× Eidolon Shard	1× Brilliant Eidolon Shard	Arcane Victory, Arcane Healing, Arcane Nullifier
Gantulyst	3× Eidolon Shard	1× Radiant Eidolon Shard, your Brilliant shard back	Arcane Guardian, Arcane Ultimatum, Arcane Aegis
Hydrolyst	5× Eidolon Shard	2× Brilliant, 2× Radiant Eidolon Shard, 2× Riven Transmuter	Arcane Energize, Arcane Grace, Arcane Barrier

You convert the shards into Focus for any school via the Focus screen on your Orbiter:

Shard	Focus
Eidolon Shard	2,500
Brilliant Eidolon Shard	25,000
Radiant Eidolon Shard	40,000

• Focus from Brilliant Eidolon Shards does not count toward the daily Focus cap.
• Brilliant shards are also needed to make certain Focus abilities available for every school (together with 750,000 Focus per ability).
• Intact Sentient Core, Exceptional Sentient Core and Flawless Sentient Cores can be traded to the Quills for standing.
• On the How to unlock and master the Steel Path, each Eidolon also gives 1 Steel Essence, whether you kill or capture it.

• Play in a squad. Solo, the Gantulyst and Hydrolyst in particular are very hard.
• Sentients are weak to Radiation and Cold and resist Corrosive. Weapons with high damage per shot, such as sniper rifles, work best on the Synovia.
• Explosive weapons are a poor choice: if they hit the invulnerable body instead of the joint, the damage is lost.
• Volt can boost your Operator’s damage with his Electric Shield. Chroma and Harrow are popular picks as well.
• The mod Shattering Impact strips the Eidolon’s armor bit by bit, even while the shield is still up.
• Switching to your Operator’s Void Mode lets you dodge the big attacks.
• Charge your Lures before you attack the Eidolon, so it does not teleport away after the first joint.