Fisch: How to Get the Rod of the Singularity (Corvus and Merlin Quests)

The Rod of the Singularity is one of the heaviest-capacity rods in Fisch, and it sits behind two connected quest chains inside the Astral Cavern network. You start with Corvus, hand in four mutated items to earn a Dyson Sphere, then take that sphere to Merlin and catch five special components scattered across separate Astral Cavern locations. Neither quest is difficult mechanically, but both demand specific rods, totems, and bait to force the right mutations.

Quick answer: Talk to Corvus in the Abyssal Zenith Astral Cavern, deliver 12 Nova Gold Pieces, 12 Celestial Scrap Metal, 1 Shiny or Sparkling Celestial Crowned Anglerfish, and 1 Nova Hardened Glass to receive the Dyson Sphere. Give the sphere to Merlin, catch the five Collapse components, and return to Merlin to unlock the rod.

Gear you need before starting

The whole questline depends on forcing two mutations onto items you catch. The “Nova” mutation comes from the Cerulean Fang Rod or the Rod of the Cosmos. The “Celestial” mutation comes from the Celestial Rod. Garbage bait raises the chance of pulling up trash-type items like scrap metal, and totems let you set the weather, time, and luck conditions needed for the rarer catches.

Item	Purpose
Cerulean Fang Rod / Rod of the Cosmos	Applies the Nova mutation
Celestial Rod	Applies the Celestial mutation
Omnirod	Used for the Stabilizer Core catch
Garbage bait	Increases trash-item catches (scrap metal)
Sundial, Aurora, Shiny Totems	Set time, weather, and luck for rare fish

Corvus quest: gather four items for the Dyson Sphere

Corvus stands in the Abyssal Zenith Astral Cavern. From Moosewood, route through Roslit Bay, teleport to Abyssal Zenith, then navigate into the Astral Cavern to reach him. Talking to Corvus opens the first collection quest.

Speak to Corvus in the Abyssal Zenith Astral Cavern to accept the quest. He asks for four items, all of which carry specific mutations, so keep the correct rods ready before you leave.

Player standing at the Corvus NPC in the Abyssal Zenith Astral Cavern starting the first quest — The Corvus NPC in the Abyssal Zenith Astral Cavern, where the first collection quest begins. Image credit: Roblox

Head to the Mineshaft, reached by way of Sunstone Island and the Chasm entry, and fish there with the Cerulean Fang Rod or Rod of the Cosmos. Pull up 12 Nova Gold Pieces. The Nova mutation is what makes these qualify, so use only the Nova-capable rods.

Move to The Depths and equip the Celestial Rod with Garbage bait. Catch 12 Celestial Scrap Metal. The garbage bait keeps trash items coming, and the Celestial Rod stamps the required mutation on each piece.

Click and Hold Anywhere prompt on screen while collecting Celestial Scrap Metal in The Depths — Reeling in Celestial Scrap Metal in The Depths, with the progress-speed bonuses shown at the bottom of the screen. Image credit: Roblox

Return to Abyssal Zenith and set up your totems. Use the Shiny (or Sparkling) Totem alongside conditions from the Sundial and Aurora Totems, then catch a Shiny or Sparkling Celestial Crowned Anglerfish with the Celestial Rod. You only need one.

Stay in the Abyssal Zenith Astral Cavern and switch back to the Cerulean Fang Rod or Rod of the Cosmos. Catch 1 Nova Hardened Glass. The quest tracker updates to 1/1 once it lands in your inventory.

Quest tracker reading Catch and return 1 Nova Hardened Glass 0 of 1 while searching underwater — The quest tracker counting the single Nova Hardened Glass needed for Corvus. Image credit: Roblox

Go back to Corvus and hand in all four items. He gives you the Dyson Sphere in return, which is the key to starting the second quest.

Corvus quest item	Amount	Where / how
Nova Gold Piece	12	Mineshaft, Cerulean Fang Rod / Rod of the Cosmos
Celestial Scrap Metal	12	The Depths, Celestial Rod + Garbage bait
Shiny/Sparkling Celestial Crowned Anglerfish	1	Abyssal Zenith, Shiny Totem + Celestial Rod
Nova Hardened Glass	1	Abyssal Zenith Astral Cavern, Nova rod

Merlin quest: catch the five Collapse components

Deliver the Dyson Sphere to Merlin to trigger the “Rod of the Singularity: Collapse” quest. This stage asks for five unique fish, each found in a different Astral Cavern. Placing a teleport point near Merlin saves a lot of travel time between catches.

Flower Glider selected in the hotbar while moving through Moosewood Village — Moving between hubs in Moosewood Village before handing the Dyson Sphere to Merlin. Image credit: Roblox

Fish in the Abyssal Zenith Astral Cavern with the Omnirod to catch a Levitas Stabilizer Core. This is the first of the five components.

Travel to the Cryogenic Canal Astral Cavern and catch a Sacratus Unstable Crystal.

Gliding above the Moosewood Village dock with the Flower Glider equipped — Gliding between locations while collecting the five Collapse components. Image credit: Roblox

Head to the Everturn Forest Astral Cavern and catch a Levitas Umbral Matrix.

Go to the Snowcap Island Astral Cavern and catch a Sovereign Singularity Control Unit. Use a totem to set the weather here if the conditions call for it.

Blue Moon weather effect triggered by a totem clearing the sky in a blue-lit cavern — A totem setting the Blue Moon weather while catching the Singularity Control Unit. Image credit: Roblox

Catch the last component, a Levitas Stellar Wiring, then return to Merlin to complete the quest. Handing in all five unlocks the Rod of the Singularity.

Collapse component	Astral Cavern location
Levitas Stabilizer Core	Abyssal Zenith (Omnirod)
Sacratus Unstable Crystal	Cryogenic Canal
Levitas Umbral Matrix	Everturn Forest
Sovereign Singularity Control Unit	Snowcap Island
Levitas Stellar Wiring	Astral Cavern catch

How to confirm the unlock and the rod’s stats

When you turn in the fifth component, Merlin completes the Collapse quest and the Rod of the Singularity appears in your inventory. If it does not register, check that each component still carries its correct prefix and that you caught them fresh in the right cavern, since a mismatched item will not count toward the turn-in.

Stat	Value
Lure Speed	60%
Luck	70%
Control	0.1
Resilience	20%
Max Kg	100,000kg
Preferred Luck	0%
Progress Speed	10%

The high weight ceiling and 70% Luck make the Rod of the Singularity a strong pick for pulling heavy, rare catches once you have finished both chains. Keep your Nova and Celestial rods on hand until the very end, because every mutated item Corvus and Merlin ask for depends on the exact rod you cast with.