The siren’s echo

Siren head has made itself into your world. You will have to adventure your journeys while a tall figure follows you on your way. Adventure new deadly structures and craft new weapons.

The mod that adds the siren head monster is called SIREN HEAD: THE ARRIVAL

There are alot of different mods in the modpack such as these ones: Additional structures, Ambient sounds 6, Artifacts, Awesome dungeons nether edition,  Blueprint, Camera overhaul, Chat heads, Clumps, Comforts, Corpse, Craftable horse armour and saddle, Deeper and darker, Essential mod, Explorations, Explorify, Farmer's delight, First-person Model, Geckolib,  HT's tree chop, HT's treeplant, Iron chests, Iron furnaces, It takes a pillage, JEI, Leawind's Third person, More ships, Mouse tweaks, Not enough animations,  Ocean's delight, Oculus, Oliver's story mode armour, Personality, Polymorph, Sanity to insanity, Scuba diving, Simple hot air balloons, Sophisticated backpacks, Sound physics remastered, Sunwoo's simple gun, Terrablender, terralith, Yung's Better dungeons, Yung's better mineshafts, Young's better ocean monuments, Yung's bridges.

There are also some shaders and resource packs to help make the mod look better such as:

-Fresh moves

-Default dark mode

-Insanity shader.

Hope you enjoy the modpack!