Mutant Spider:


- Has 160 Health and will deal 6 damage per hit.
- Has same properties as vanilla Minecraft spider.
- Will randomly leap around his opponents and every 500-700 ticks spawn baby spiders to it in battle.
- Heals 3 hp every 400 ticks during the night.
- Doesn't take any fall damage and even has a spider jockey variation.
- Will drop same spider loot as normal spider.
- On death will spawn horde of babies.
- Has 1% chance to spawn in biomes like forest, desert, plains and so on..
Mutant Cave Spider:


- Has 140 Health and will deal 4 damage per hit.
- Has same properties as vanilla Minecraft cave spider.
- Will leap around randomly when fightning and spit poison around it's enemies.
- Venom armor will increase his size by 2x and echance his stats by 20%.
- Is immune to fall damage.
- When health is below 50% will active it's venom armor and will start leaping and spitting poison even more.
- Heals 3 hp every 400 ticks during the night.
- On death will spit 10x times more poison if enemy will be near him.
- Has 1% chance to spawn in biomes like forest, desert, plains and so on..
Mutant Pigman:


- Has 200 health and deals 10 damage per hit.
- Has same properties as zombie pigman that means he is neutral and immune to fire by default.
- Will jump around when fightning and every 400-600 ticks spawn pigman to aid him in battle.
- Has passive buff called iron skin that will allow him to absorb 50% of taken damage and will take only 1 damage from anything else, for example arrows, snowballs, fall damage, magic and even more.
- Is immune to fall damage and knockback as well.
- Will regenarate 3 health every 200 ticks.
- When health is below 50% will active enrage mode, that will drastically increase his speed.
- On death will summon horde of pigman to finish his enemy.
- Has 1% chance to spawn in the nether..
Mutant Iron Golem:


- Has 1000 health and deals 21-40 damage per hit to single target and 11-20 to mobs around his target.
- Is number 1 mutant in the mod, can easily defeat hordes of wither bosses and mutant pigman combined.
- Has AOE ability that will allow him to attack multiple mobs at once.
- Has same properties as Iron Golem, though will fight creepers as well.
- Can't spawn or can't be made in survival yet(suggest your ideas down below).