Volcanic Cavern

Who spawns

Common

Leezpunk IgnisLv 32–3630.8%Pyrin NoctLv 32–3615.4%Blazehowl NoctLv 34–3615.4%IncineramLv 32–3615.4%

In water

GhanglerLv 32–3650%GloopieLv 32–3650%

Bosses

FlambelleLv 32–385.6%Kelpsea IgnisLv 32–385.6%WixenLv 36–385.6%PyrinLv 36–385.6%VanwyrmLv 32–385.6%ReptyroLv 36–385.6%Gobfin IgnisLv 32–385.6%Leezpunk IgnisLv 32–385.6%IncineramLv 32–385.6%BlazehowlLv 36–385.6%RagnahawkLv 36–385.6%BushiLv 36–385.6%FenglopeLv 36–385.6%LeezpunkLv 32–385.6%DumudLv 32–385.6%Pyrin NoctLv 36–385.6%Blazehowl NoctLv 36–385.6%GloopieLv 32–385.6%

Chest loot

Ordinary chest

Gold Coin×1500–2100100%High Quality Bait×2–366.7%Medium Pal Soul×1–238.7%Simple Bait×2–333.3%Coarse Ammo×5–1028%Giga Sphere×1–228%Rushoar Bacon 'n' Eggs×1–228%Hyper Sphere19.3%Silver Key15.5%Training Manual (L)×1–212%Training Manual (XL)4%Medical Supplies3.9%Old Revolver Schematic 13.9%Handgun Schematic 13.1%Recovery Meds2.3%Metal Armor Schematic 12.3%Double-Barreled Shotgun Schematic 11.5%Single-Shot Rifle Schematic 11.5%Metal Helm Schematic 11.5%Heat Resistant Metal Armor Schematic 11.2%Cold Resistant Metal Armor Schematic 11.2%Old Revolver Schematic 20.8%Handgun Schematic 20.6%Metal Armor Schematic 20.5%Double-Barreled Shotgun Schematic 20.3%Metal Helm Schematic 20.3%Old Revolver Schematic 30.2%Heat Resistant Metal Armor Schematic 20.2%Cold Resistant Metal Armor Schematic 20.2%Handgun Schematic 30.1%Double-Barreled Shotgun Schematic 30.1%Metal Helm Schematic 30.1%Metal Armor Schematic 30.1%Old Revolver Schematic 40%Handgun Schematic 40%Double-Barreled Shotgun Schematic 40%Metal Helm Schematic 40%Metal Armor Schematic 40%Heat Resistant Metal Armor Schematic 30%Heat Resistant Metal Armor Schematic 40%Cold Resistant Metal Armor Schematic 30%Cold Resistant Metal Armor Schematic 40%

Special chest

Gold Coin×2200–2500100%Innovative Technical Manual32.3%Ancient Technical Manual×1–232.3%Bellanoir's Slab25.3%Treasure Map No. 110.1%

Dungeons of a biome are scattered across that region, but the game data has no 'this cave = this dungeon' map link — the entrance is assigned procedurally.