How to Get Thunder Quartz from Vesper
In recorded Disease Era gameplay, Thunder Quartz is awarded as a main quest milestone reward from NPC Vesper.
The quest sequence requires enchanting a weapon with a Gem at the Blacksmith after clearing a 30-enemy elimination quota. Walkthrough footage shows that defeating Puppeteer is not a prerequisite for receiving this crystal from Vesper.
Advance Disease Era story tasks
Progress through early story tasks to earn Runner status, then defeat 30 enemies in any area.
Enchant a weapon at the Blacksmith
Use a Gem at the Blacksmith station to complete the enchantment objective on your main quest log.
Receive the crystal from Vesper
Speak with Vesper to complete the task and receive 1 Thunder Quartz.
Thunder Quartz Item Properties and Night Restrictions
Once acquired, Thunder Quartz appears under the Items category in your inventory bag. The item tooltip classifies it as Rare quality and One-Time Use. You can assign it to your hotbar for activation.
Attempting to use Thunder Quartz during daylight triggers an on-screen notification: 'Can only be used at night.' In recorded gameplay, daytime activation failed without consuming the item, leaving the crystal in the player's bag.
| Condition | Observed In-Game Result | Action Required |
|---|---|---|
| Daytime activation attempt | Screen prompt displays 'Can only be used at night'; activation rejected | Retain crystal in inventory and wait until night falls before retrying |
| Nighttime activation in deep Veil | Crystal shatters and disappears; Stormcaller spawns with full health bar | Engage Stormcaller immediately |
| Item countdown HUD | Displays an item countdown (~480 seconds / 8 minutes) on lower-left screen | Observe the on-screen countdown; do not treat it as an automatic item refund guarantee |
Summon Stormcaller Deep in The Veil
The main quest tracker instructs players to travel deep into The Veil and shatter the quartz at night. When activated successfully, the crystal leaves your inventory, Stormcaller's health bar appears overhead, and an item countdown starting near 480 seconds (approximately 8 minutes) displays in the lower-left HUD.
Travel deep into The Veil
Follow your main quest guidance to travel deep into The Veil and use the item at night.
Wait for nightfall
Wait until the NIGHT TIME banner appears and ambient darkness covers the pathways.
Shatter the Thunder Quartz
Equip the crystal to your hotbar or select it from inventory, then activate it to shatter the quartz and summon Stormcaller.
Crown Trone: Stormcaller summon and HUD retry mechanics
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HUD Retry Guidance and Failed Summon Troubleshooting
Because Thunder Quartz is a one-time use item, successfully shattering it to summon the boss consumes the crystal from your inventory.
Gameplay footage demonstrates that upon shattering Thunder Quartz—while Stormcaller remains active and the quest tracker reads Slain 0/1—the main quest text immediately updates to instruct returning to Vesper for another crystal. This prompt does not mean the boss was defeated; it shows where to go if you need a replacement.
If your encounter fails, follow the HUD prompt back to Vesper to seek another crystal, as specific replacement conditions remain unrecorded.
| Problem Encountered | Underlying Cause | Recommended Next Step |
|---|---|---|
| Nothing happens when clicking crystal | Potential factors, such as attempting activation during daytime or outside deep Veil | Check on-screen prompts; wait for nightfall and ensure you are deep in The Veil |
| Quartz vanished from bag after click | Crystal consumed upon successful summon | Check around for Stormcaller's overhead health bar to confirm whether the summon succeeded |
| Quest HUD says return to Vesper during fight | Quest text updates upon item consumption while Slain is 0/1 | Disregard the prompt while the boss is still alive and continue fighting |
| Died to boss with no Quartz left | Crystal was consumed during the initial summon | Follow the quest prompt back to Vesper to seek a replacement summon crystal |
| Rechallenging Stormcaller after quest completion | Repeatable acquisition from Vesper remains unverified | Join a party member who still carries an active Thunder Quartz |
Next Steps After Defeating Stormcaller
After defeating Stormcaller, follow the updated main quest guidance to return to Vesper. In recorded Disease Era progression, concluding this dialogue opens the subsequent milestone directing players to locate Vesper's acquaintance and pursue the Maddening Informant.
If you want to fight Stormcaller again after finishing your main quest milestone, recorded gameplay shows players chaining encounters when party members carry their own summon crystals. Solo acquisition from Vesper after quest completion remains unverified.
Disease Era Progression Walkthrough
Track story milestones from early tasks through to the Festering Wound finale.
The Veil Boss Index
Compare night conditions, summon items, and battle arenas across major encounters.
Festered Meat Guide
Learn how to obtain the Elite offering required for the Maw Of Decay altar.
Quick answers
Who gives you the Thunder Quartz in The Veil?
Thunder Quartz is awarded by NPC Vesper as a Disease Era main quest milestone reward following the weapon enchantment task at the Blacksmith.
Why won't Thunder Quartz activate when used?
Thunder Quartz requires nighttime conditions and use deep within The Veil per quest objectives. Daylight attempts have been observed to display a 'Can only be used at night' prompt and retain the crystal, though item retention across all failure conditions is unconfirmed.
Is Thunder Quartz consumed on use?
Yes. According to its tooltip, Thunder Quartz is classified as Rare and One-Time Use, and it is consumed upon successfully summoning Stormcaller.
Why does my main quest say to return to Vesper while Stormcaller is still alive?
The quest HUD updates when the crystal is consumed to direct players back to Vesper if the boss is Slain 0/1. If Stormcaller is currently active in front of you, disregard the text and continue the fight.
Where do you get another Thunder Quartz if you fail the fight?
If your quest objective remains Slain 0/1 after a wipe, the in-game HUD directs you back to Vesper to obtain another crystal; specific replacement conditions remain unrecorded.
Can you fight Stormcaller again after completing the quest?
Gameplay footage shows players chaining battles by having party members use their own personal crystals. Whether Vesper offers repeatable crystals after quest completion remains unverified.