Craft or obtain a torpedo launcher for a Seamoth or Prawn Suit
Load torpedoes into the launcher’s storage slots
Equip the vehicle with the torpedo launcher...
Go to the Lost River
Enter the Inactive Lava Zone
Find the Lava Castle
Enter the Lava Lakes
Locate the giant alien structure near the lava river area
Use...
Collect Gel Sacks
Collect Ruby
Use the Fabricator
Craft Aerogel from 1 Gel Sack and 1 Ruby
Find Gel Sacks in the Blood Kelp Zone, Jellyshroom Cave, Lost...
