MINECRAFTBIBLE
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Mod that improves mob ai
About:
Big Brain is a mod that focuses on adding smarter ai for the many mobs of Minecraft!
Features: (all are configurable)
moved to Piglin Proliferation in 1.20
All non-flying and non-tamed animals except for cats and foxes will attempt to find shelter when it's night or raining. They will also alert their herd members to panic if one of them is attacked.
All the other animals have special features, cows give leather, which can be used to make armor, chickens have feathers that are used to make arrows, sheep even have wool, that you use to build things. Pigs on the other hand don't have any advantages.
This mod changes that, pigs now have a larger litter size of 2 - 6 piglets, giving the player a reason to consider breeding pigs for their farm. 
moved to piglin proliferation in 1.20
Pillager combat can get boring, most of the time they charge you with no regard for their lives.
Pillagers are still dumb with this mod, but at the very least care for their own lives.
They now run to another direction while they're reloading, they also move closer to you if they have a multishot crossbow.
Pillagers leaders in patrols also now have the ability to notice you from a farer distance by using a spyglass that they have a 50% chance of spawning with.
Snowballs are now able to give entities 5 seconds of freezing, which can be added up by successive shots.
These are changes that apply to all mobs:
-Blindness now affects mob vision, reducing their range by 90%. This stacks with other vision modifiers.
-A patch for melee mobs resetting their attack cooldown if they were in front of you has been added.
-A config option has been added to allow all mobs to attack villagers, this is disabled by default and has a blacklist included.
-Mobs that are able to open doors are now able to open fence gates as well. 
-Bow-wielding mobs now have a new attack pattern. Many people complain about bow-wielding mobs being frustrating to fight against. This rework is meant to help mitigate against this notion. Instead of strafing bow-wielders will instead stand still until they fire three shots. After three shots they will move to another position. If the player is too close for comfort then they will also try to find another position.
-Humanoid mobs, such as piglins and zombies, are now able to jump through gaps (credits to the Mobs Attempt Parkour mod for their direct inspiration)
Husks will now upon seeing the player burrow for some time and attempt to grab and drag the player down.
However, if a significant amount of damage is dealt while the husk is burrowing it will cancel its attack and do regular melee.
You cannot escape the husk while being grabbed but you are allowed to attack it since it has a delay between grabbing and pulling you down.
Going on a higher elevation level than the husk will tire it out and also cause it to go into regular melee stance.
Ocelots now attack creepers, parrots, and phantoms to give them some purpose.
Sheep now run away from wolves instead of acting like nothing is happening.
Polar bears now attack fish.
Is this mod compatible with x?
Try them both and see!