How can I make the Hard difficulty harder?
I want Hard mode to be more difficult. I want the mobs to be tankier (more health points) and hit harder (do more damage). How can I do that?
Solution 1:
The easiest way is probably with status effects. Put a repeating command block chain down somewhere with these commands:
effect give @e[type=!player] strength 1 0 true
effect give @e[type=!player] resistance 1 0 true
You can increase the 0 to increase the effect. But note that with 4 or more as the value for the resistance effect amplifier, all mobs become invincible (except for void damage and commands).