Skin stealer
Crafting
Flat world
Enchant calculator
Armor color
Firework crafting
Banners crafting
Shield crafting
Custom world
Mobs Generator
Loot tables
Custom potions
Beacon color
Book editorSCP-538 (Shadow Spiders)
SCP-538 (Shadow Spiders) for Minecraft by TacticalTurtle
SCP-538 (Shadow Spiders)
by 
TacticalTurtle
Here is an SCP article on SCP-538:
http://www.scpwiki.com/scp-538
Link to share: