How can I change a mob's speed and damage ?

Hello,I just recently started playing around with java and experimenting stuff by making small bukkit plugins.I really want to mess around with a mob's setting so I am asking is there a way to change their speed or maybe even more?

 

NMS entities have a protected movement speed variable. I think in 1.5.1 its obfuscated to be "bI". To change it you'll have to use reflection.

Damage is set via a function, so the only way to change this is to create your own entity and override this function. Currently it's "public int c(Entity entity)". If you don't already know how to do class inheritance I suggest you look up a tutorial.

 

You can actually edit most of this stuff, catching and modifying damage events and adding PotionEffectType.SPEED to mobs.