Either a new modifier or simply make extract do this? Please?

I want to pull or knockback mobs and not grief my world

If you have/can add TooManyGlyphs, it adds filter glyphs that prevent the spell from affecting specific things

Unfortunately I am on a server where they do not want to add any more mods, so that wont be possible. But to prevent future users from experiencing this, I hope this functionality can be added?