The Cylindrical Prism

Type Secondary Quest
Act Lost Valley DLC
Location Secret Facility
Reward(s) ???

The Cylindrical Prism is a Secondary Quest from the Lost Valley DLC in Solasta: Crown of the Magister. Quests are different tasks and missions that a player can acquire and partake in throughout the game, quests are usually unlocked through the main campaign, during a series of events, or are given by certain NPCs. Completing a quest also grants various rewards that can aid the player throughout their journey.


The Cylindrical Prism Objectives

Find the Cylinder Prism Key
Use the Cylinder Prism Key



The Cylindrical Prism Walkthrough

This quest can be activated after reaching the Secret Facility and beginning The Research Complex Quest. You will need to make your way through the Facility, take the Elevator down to the underground levels and navigate through the Security Room and make your way to the Tunnels until you reach the northern section. 


Northern Section

Continue forward down this hall and a new waypoint, Northern Section. If you continue forward, you will begin a battle. While you are here, you can attack the creatures you see first to get the first attack in. You can do this while keeping some of your characters hidden. You will be facing a Mutant Minotaur and a Mutant Tiger Drake. Clear the Drake who will only have 39 HP and you can focus solely on the Minotaur who will stand at 142 HP. Since the area is so small, you can stand your ground and continue to bombart it with your ranged attacks. There is a trap directly in front if you didn't step in too far. If you didn't approach past it, it will take a turn to pass the trap and take some damage and you can continue to attack until his hp is depleted. Clear the last trap and continue to be cautious. Highlight the area to find the interactable keyhole on the wall. Interact with it to begin the quest.


Find the Cylinder Prism Key

This key would've been located back at the Security Room, in a dining hall area. Loot it on the table before proceeding to the Elevator to the underground. 

 secret facility dining dlc ost valley solasta wiki guide 600px min


Use the Cylinder Prism Key

This can be used deep into the tunnels in the Major Gate Room. This is across the Testing Arena and past the Northern Section of the Tunnels. 

To access this area, you will need to clear the mutated test subjects in the arena to gain access to the corpse that will have the Sphere Prism Key required for the Major Gate Room. Return to the Major Gate Room which is directly north of the testing arena, use the key on the gate to access the area. Take the East hallway and interact with the switch to complete this quest. Entering the Major Gate Room will also complete the The Sphere Prism Key secondary quest.

Take the east hall and open the security gate. There will be another gate past this where you can use the Cylinder Prism Key.

secret facility cylindrical keyhole dlc lost valley solasta wiki guide 600px min




How to obtain The Cylindrical Prism

  • Purchase and download the Lost Valley DLC in order to be able to access this quest. Progress through the main questline, and through a desired Faction questline until you unlock the Secret Facility.


The Cylindrical Prism Rewards and Loot

  • ???
  • ???


The Cylindrical Prism Notes & Tips

  • Notes & tips go here


Solasta: Crown of the Magister Secondary Quests
A Furry Task  ♦  A Giant Step  ♦  A Mysterious Place  ♦  A New Cushion  ♦  A New Seat  ♦  A Safe Passage  ♦  A Simple Job  ♦  A Small Detour  ♦  A Small Favor  ♦  A Thief's Work  ♦  A Trusted Carrier  ♦  A Very Tempting Place  ♦  A Well-Ordered Room  ♦  Ancient Knowledge  ♦  Angbi's Bones  ♦  Apostasy  ♦  Archeology  ♦  Arwin Merton's Story  ♦  Bitterroot's Treasure Map  ♦  Blue Blood  ♦  Confrontation  ♦  Convey the Scavengers' Message  ♦  Elevator  ♦  Family Reckoning  ♦  Garden Party  ♦  Goblin Culture  ♦  Heritage of Distrust  ♦  Hickory Corner Wood (Quest)  ♦  History of Violence  ♦  Honor Your Masters  ♦  Into the Depths  ♦  Join the Rebellion  ♦  Jungle Escort  ♦  Lair of Filth  ♦  Love Story  ♦  Major Gate  ♦  Manacalon Riches  ♦  Meat Boy  ♦  Meeting the Rebellion  ♦  Misaye's Birthday  ♦  New Business  ♦  Origins of the Crown  ♦  Precious Paper  ♦  Primal Threat  ♦  Quest for Information  ♦  Raid for Rose  ♦  Rebel Outpost  ♦  Reconnaissance  ♦  Rescuing Reya  ♦  Rough Diplomacy (Quest)  ♦  Runs in the Family  ♦  Sabotage  ♦  Secret Report  ♦  Shadow of the Defiler  ♦  Shadow of the Past  ♦  Shallow Grave  ♦  Sorak Relic  ♦  Suspicious Ingredients  ♦  Temple of the Lost Gods  ♦  The Arena  ♦  The Blocked Cave  ♦  The Blue Potion  ♦  The Bully  ♦  The Butcher  ♦  The Collector  ♦  The Conquest  ♦  The Dominion Strikes Back  ♦  The Dryad Queen  ♦  The Escape from the Manor  ♦  The Escape Plan  ♦  The Head Collector  ♦  The Last Endeavor  ♦  The Law is the Law  ♦  The Lord Protector  ♦  The Lost Apprentice  ♦  The Lost Book  ♦  The Lost Giants  ♦  The Magister's Amulet  ♦  The Messenger  ♦  The Missing Party  ♦  The Nature of Evil  ♦  The Palace  ♦  The Prisoners  ♦  The Rebellion Rises  ♦  The Renewal  ♦  The Research Complex  ♦  The Research Complex (Forge and People)  ♦  The Secret of the Swamp  ♦  The Security Gate  ♦  The Sphere Prism Key  ♦  The Swamp Base  ♦  The Tyrant  ♦  The Underground Ruins  ♦  The Witch Hunt  ♦  The Wizard's Lair  ♦  The Wolf Menace  ♦  Tortured  ♦  Ugly Truth  ♦  Ultimate Threat  ♦  Under His Eyes  ♦  Visit the Local Scavenger HQ  ♦  Wartime Treasure  ♦  Wind of Change


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