Taintacle (Thaumcraft 6)

The Taintacle is a temporary hostile mob added by Thaumcraft 6. It is spawned by Taint Seeds as its attempt to attack nearby players. It appears as purple tentacle protruding from tainted blocks and damages any players who are struck by it, dealing damage and inflicting level 2 Taint Poison for 4 seconds. Taintacles last for 4 seconds before despawning.