Boss Summoners

Boss summoning items are items used to spawn much more difficult enemies. Nightmares Unleashed currently adds 8 bosses, but at least 16 are planned.

Sandylion
The Sandylion is used to summon the Antlion Queen. It is crafted with 4 Antlion Legs and 5 Sand blocks at a Sand tile.

Golden Clam
The Golden Clam is used to summon Clampula. It is crafted with 5 Gold or Platinum bars, 5 Coral, and 1 Seashell at a Sand Block.

Spitter Bait
Spitter Bait is used to summon the Mother Spitter. It is crafted with 12 Rough Flesh at a Demon Altar.

Mechanical Spine
The Mechanical Spine is used to summon The Mechanical Membrane. It is crafted with 5 Iron or Lead bars, 3 Souls of Night and Light, and either 35 Rotten Chunks or 25 Tissue Samples at a Mythril / Orichalcum Anvil.

Drone Signal
The Drone Signal is used to summon the Master Drone.

It is crafted with 5 Titanium or 5 Adamantite, 3 Souls of Light and 3 Souls of Night at a Mythril / Orichalcum Anvil.

Fungal Ball
The Fungal Ball is used to summon the Behemoth. It is crafted with 5 Mud, 15 Glowing mushrooms, 3 Illuminated Caps and 3 Beetle Husk at a Mythril / Orichalcum Anvil.

Mimic Key
The Mimic Key is used to summon the Gimimmick. It is crafted with 10 Hallowed Bars, 8 Ectoplasm and 10 Gold Coins.

Once placed in an empty chest, and the player closes it, the chest will replace into the boss.

The Skull Idol
The Skull Idol is used to summon the final boss of Nightmares Unleashed, the Void Marshall. It is crafted with 3 Luminite, 5 Black Fabric, 10 Black Gunpowder, and one Void Power Core. It is crafted in groups of five due to it's difficulty to obtain.

Once used, the boss does not spawn, instead spawning the Suspicious Looking Man. If you agree to help him, the man will die and the boss will spawn.