How can i give a mob special abilities?

each variable is a different code/process, what 'special abilitie' ? you got to specify it. i can help with some but others i cant do myself.. for example, im trying to code a mob that walks on land and swim on water, i cant do it. nor can i change the swim speed of my mobs.

You could add these "abilities" to a procedure when a mob is hurt. For example, lets say you wanted a mob to have a chance of activating a regenerative ability when it is damaged. Here is what it might look like:

If health < [value] and random number < [percent/100]

then,

give effect regeneration [time] [strength]

(OPTIONAL) spawn particles at x y z

(OPTIONAL) play noise at x y z

This is just an example of what you can do with procedures, so mess around with procedures a bit and you might be able to make an "ability" working the way you want.