Old Spellbreaker Magic Block? Still In?

Is this skill still around? I can't find it, but I would really like to use it with a spellbreaker unit. Thank you.

You mean Magic Defense? He raises his shield to get magic immunity but is slowed? It's under the human abilities section

For future reference, in the Object Editor, use Ctrl + F and type in the name of what your looking for. So, just go intot he Object Editor, do Ctrl + F and type in 'Magic Defense'.