Discover every creature in the Frigid Cavern, their bait, and the best fishing times. Don’t miss the hidden NPC with a rare reward.

The Frigid Cavern in Fisch is an icy paradise packed with rare creatures and hidden secrets. It’s part of the Northern Expedition Island update, bringing chilly new challenges. A frozen lake, towering ice formations, and mysterious wildlife make it a must-visit location.
Some creatures lurk in the depths, waiting for the right bait. Others only appear at night or during specific seasons. A hidden NPC, tucked behind an ice spike, holds a special surprise. The Green Energy Crystal, a key to the Heavens Rod, is yours if you find it. Fishing here requires preparation and patience. The cold drains your Heat and Oxygen, so dress warmly.
Finding the Frigid Cavern
The Frigid Cavern is one of four Bestiary locations in the Northern Expedition Island update. To get there, travel to coordinates (19848, 440, 5630) or move southeast from the Pickaxe camp. You will know you’re close when your Heat and Oxygen bars start depleting.
Inside, you will find a round pool of water, surrounded by rock and ice formations. The area is small, but it holds valuable catches. Look behind an ice spike on the north side of the cave to find “???,” a hidden NPC. Talking to them will grant you the Green Energy Crystal, which is necessary to obtain the Heavens Rod. This is a one-time interaction, so make sure to collect it before leaving.

Bestiary for Frigid Cavern
The Frigid Cavern is home to several species, including uncommon, unusual, rare, legendary, and mythical creatures. Each requires specific bait and appears under certain conditions.
Uncommon Creatures
- Frigid Shrimp – Uses Flakes as bait. Spawns at night during winter.
- Ice Eel – Uses Flakes as bait. Spawns at night during winter.
Unusual Creatures
- Ice Jellyfish – No bait preference. Spawns at any time during winter.
- Ice Octopus – Uses Fish Head as bait. Spawns during the day in winter.
Rare Creatures
- Snowfish – Uses Fish Head as bait. Spawns at any time in winter.
- Frigid Taco – No bait preference. Spawns at any time in winter.
Legendary and Mythical Creatures
- Polar Alligator – Uses Fish Head as bait. Spawns at night in winter.
- Frigid Mammoth Tusk – No bait preference. Spawns at any time in winter.
Fishing Tips for the Frigid Cavern

Fishing in the Frigid Cavern is different from other areas. The extreme cold reduces Heat and Oxygen levels, so be prepared before entering.
- Bring the right bait – Most creatures require Flakes or Fish Head, so stock up before heading in.
- Time your fishing sessions – Some fish only appear at night or during the day. Check the Bestiary before casting your line.
- Prioritize rare catches – Legendary and mythical creatures are the hardest to find. Use high-luck rods and server boosts to increase your chances.
- Do not miss the NPC interaction – The Green Energy Crystal is a crucial item for unlocking the Heavens Rod. Since it is a one-time reward, make sure to collect it.
The Frigid Cavern is an excellent location for players looking to complete their Bestiary and catch exclusive creatures. With the right bait, strategy, and equipment, you can make the most of your time in this icy fishing zone.
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