Mob Environment Interactions [Fixed]

Introduction 

This datapack is part of my personal world and attempt to make minecraft more challenging for myself. The datapack has been tested immensly through personal play. The Ravager Grief, shady Zombies and Farm Tremplers parts of the datapack are what add a real level of challenge, while everything else are small world details. This datapack is perfect for an already existing world, and new ones as it immediately affects the world and your progression won't ruin the immersion.

Instructions

Download the .Zip file and extract, place the contents inside your datapack folder of your world.

Description

This datapack will add the following new procedures randomly every minute:

Spiders and cave spiders will produce cobwebs where they are sitting; making cave exploration and prolonged stay in a world, feel more alive and menacing in the least lit places.

Pigs will turn grass blocks into coarse dirt.

Zombie Pigmen will spread nettherack into stony material and soulsand into dirt & sand material.

Magma Cubes will melt netherrack into magma blocks.

Skeletons will fertilise stone, dirt and gravel with mushrooms and dead corals!.

Creepers will fertilise (coarse) dirt into grass, change (cobble)stone material into their mossy variants including stairs and slabs and lastly leave grass on grass blocks and ferns on gravel.

Ravagers will break blocks around them, making village wall-breaching a thing and generally making raids harder. Obsidian can stop them!

The datapack is highly configurable and you can easily remove any parts you don't like, if you're for example interested in the alive world more than the challenging world aspect.

The previous all work nicely into bringing your cave expeditions to life. Also happens immediately:

Passive land-mobs as well as zombies and skeletons will tremple nearby crops.

All Zombie Variants will remove torches in a 2 block radius square around them. This adds immensly more challenge to the world as your light source is expendible. Personally I boost zombie reinforcements stats (60%) with this and have negative gamma values(-0.39) for my world light. You can change this from the "options" file in your .minecraft folder. Neither the reinforcements nor shadows are on this datapack.

All Zombie Variants will wither saplings to dead bushes.

Bug Report

I will be grateful if you report anything you might find working odd with this datapack, so I can quickly publish fixes.