This is Nightmare PVP
The 16x16 Resource Pack for pvp
Use Optifine to see the HD sky!
Adds:
-Low fire
-No explosion particles
-New font(EN only)
-Custom textures
-New HD sky(optifine only)
-New hotbar
-Dark inventory and all containers
-New icons
-3D blocks
-3D items
-Blackstone background
-Many fixes
-Low grass on blocks
-New panorama
-Beautiful leaves
-Transparent pumpkin on the head
-Сolored particles of enchanting table
Images:
In last update(0.0.4):
-New "edition", removed splashes
-New background
-New hotbar
-New 1.18 stone pattern 
-New textures of ores
-Dark furnaces
-Crafting Table fix
-Nylium fix