Added in Beta 1.0.1 (Beta 1.0.2, 1.0.3 and 1.0.4 also released):

MOBS:

•Stalker
•Hunchback
•Lush Stalker
•Undead Warden
•Hollowed

BLOCKS:

•Trypophobic Sculks:
Trypo Sculk
Trypo Sculk Sensor
Trypo Sculk Catalyst
Trypo Sculk Vein

•Pitch Sculks
Pitch Sculk
Pitch Sculk Catalyst
Pitch Sculk Vein

•Bone Sculks:
Block of Bone
Bone Sculk Catalyst
Grown Bone
Fossiled Bones (two types)

Added in Beta 1.0.3 :

MOBS:

•Bat Face

•Batter

•Dead Stalker

•Deep Dark Trader

•Glowing Fly

•Half Rotten

•Hunchkin

•The Hunger

•Moss Stalker

•Rusted Hunch

•Sculk Chute

•New Stalker

•Watchman (Not from Concept)

BLOCKS:

•Bone Sculks:

Block of Bone

Bone Catalyst

Fossiled Bones (2 types)

Grown Ribs

Grown Bones

•Rust Sculks:

Rust

Rust Catalyst

Rust Veins

•Corrupted Sculks:

Corrupted Sculk

Corrupted Catalyst

Corrupted Veins (2 types)

Corruptions (2 types)

•Dark Void Sculks:

Dark Void Sculk

Dark Void Vein

Dark Void

•Grimstone (Old Deepslate):

Grimstone

Cobbled Grimstone

Grimstone Brick

Cracked Grimstone Brick

Grimstone Tile

Cracked Grimstone Tile

Grimstone Coal Ore

Grimstone Iron Ore

Grimstone Gold Ore

Grimstone Copper Ore

Grimstone Diamond Ore

Grimstone Emerald Ore

Grimstone Lapis Ore

*How you can get the blocks and mob spawns*

This addon is completely creative addon yet. You can get none of these in Survival (as of yet).
To get mob spawn eggs, you can go to creative inventory and search spawn eggs of whatever mob you want to spawn.
To get the blocks, you have to use commands; Use the command /give @s wr:the_block_you_want or you can find them in creative inventory

Added in Beta 1.0.4:

New Mobs:

Crying Stalker

Eater

Scaleman

Constellation

Infector

Wither Stalker

Albino Owl

Skull Mask

New Blocks:

Pitch Sculk Blocks:

Several Improvements to the textures

Pitch Shrieker

Pitch Sensor

Rusted Sculks:

Several Improvements to the textures

Bone Rust Sculks:

Rust Bone Sculk

Rust Bone Catalyst

Rust Bone

Rust Bone Growth (2 types)

Visuals:

Added animations to Almost all the mobs in the addon

Features:

Respective Sculk Catalysts spread respective Sculks, veins and other blocks when stepping on it.

Sculk Sensors of different Sculks gives different effects when you step on them.

Shriekers spawn respective wardens when stepping on them.

Changes to old mobs in the addon:

The deep dark trader is now a passive mob and you can trade with it but if you will hit it, it will summon an agressive and powerful form of itself.

Improved Hollowed Textures. Its texture now glows in dark.

World generation changes:

Trypophobic Caves and Pitch Sculk Caves can be found in natural generation but this is a very unfinished feature and is not final for the moment. Sometimes it'll create harsh squares in the caves. And you'll find same generation every time you find it. This will be changed in upcoming updates to the addon.

Credits: 
*Addon Creator*: It's Akshad
*Texture*: It's Akshad and It's Mike

I hope you'll enjoy!

*Please provide this page link if you are reviewing this addon*

Below you can find a link for downloading.

Thanks for reading! I hope you'll enjoy this beta 1.0.4

More betas will keep releasing. For being all updated about the addon, subscribe to my youtube channel: It's Akshad 😉