Zombie Horses spawn in the animal pens of Zombie Villages instead of normal animals They can also spawn as permanent babies or ridden by zombie villagers

Adds hostile wolves in the form of Wolf Attacks as well as Wolf Dens where you can obtain horns that buff your tamed wolves and wolf teeth to repair them or craft tooth traps

Adds 4 new types of spiders that can spawn as well as a spider queen boss that spawns in new spider den structures and many new items.

Makes Skeletons that are underwater and trident drowneds less than 3 blocks away from the player do melee instead of ranged attacks, like in bedrock edition

Reduces the amount of leaf litter that spawns in forests and dark forests, only making it appear under some trees instead of under all of them

Adds Bear Traps to the game, they can be used to damage mobs that step on them and keep them in place

This datapack expands zombies by adding a cemetery structure where a frankestein zombie can be created and leveled up. Additionally 4 new zombie types have been added

Basins are a rare, small terrain features that strip away the top layer of a biome's surface, leaving a stony floor. Due to a bug they stopped generating in 1.18. This mod/datapack adds them back