Demented Neptune

Demented Neptune is a Hardmode boss and can be spawned if you put Unholy Essence (Corruption), Intestines Essence (Crimson), Holy Essence (Hallow), Gravitational Essence (Gravitational Rift), Old Essence (The Remains...), Necromatic Essence (Zombie Vortex) or (Some biome) Essence (that biome) in the Royal Seat, it will say "Mermaids Scream at you while spirits disappear from their bodies as they fade into a pure form" and a real life half minute later it will say "Mermaids cheer at you saying "Goodluck on fighting the King" as you fade into another dimension" then your screen teleports you to the Venire Room (Biome Unlocked by defeating Demented Neptune), you see a titan and a voodoo doll of the nurse, you have to delete it and then you will see "The Atmosphere is getting insanely intense!"

"..."

"Demented Neptune, the corrupted king of mermaids has awoken"

Trivia
Hp: 32000 / 320000

Attack:

40 / 50

Trident: 90 / 160

Mystical Boom: 100 / 300

Celestial Eruption: 10 / 50 (Each block and celestial event only attack)

Nightmare Insurgency: 20 / 70 (Each strike)

Defense: 57.86

Phase 2
Hp: 10000 out of 32000 / 50000 out of 320000

Attack:

60/190

Mystical Boom: 130/ 211

Celestial Nightmare: 50/90

Elemental's Intermission: 2/ 5 each strike (Your bound to get hit 25 times if your lucky)

Marine Summon: Summons 10 Demented Marines (War mode exclusive)

Waterflames: 20/ 25 each

Scold: 40/ 499

Defense: 300

Speed: normal ×4 speed

After

 * Messages will say "The Mermaids and Mermen have been free from the curse alongside the royals!"


 * Aquamarine will spawn in the undergrounds of Atlantis
 * The Mermaid (NPC) can now spawn in your house

Drops

 * W
 * I
 * P