Kaiju Craft Add-on 1.21+

Want to truly test your abilities in battle Minecraft? Then there's nothing better than gigantic creatures that can deal an unimaginable amount of damage in a single hit. Such monsters will appear with the mod Kaiju Craft, which adds Kaiju — enormous monsters capable of destroying everything in their path.

You can fight them using powerful weapons and armor to earn valuable rewards. However, be careful: these monsters are extremely strong and can kill you with a single hit.

An interesting feature is that the author decided to combine the usual game mobs with various Kaiju. Each monster possesses an incredible amount of health (from 2000 units), and their attacks can kill any player, even with Armor.