Ability that won't break invisibility

Is there an instant-cast ability I can use as a dummy ability that will not break invisibility on a unit?

I'm trying to create a simple toggle button to make the invisible unit switch "modes" like custom value for example.

Any ideas/work-arounds greatly appreciated

All abilities (as far as I know) that require you to activate it will break invisibility.

Rats! At the moment I just have it to where it has a dummyunit recast invisibility, but it has that little moment where it is visible before it becomes invisible. Any workarounds?

I'm pretty sure there is a way to force invisibility even through attacking and casting.

won't the ghost ability let you attack while not breaking invisibility?

Add permanent invis just before cast?

Hmmmm cool when I give it perma inviso and ghost it does the trick, nice! Good idea

Is there a way to remove perma invisibility when I need to?

When the unit finishes casting the ability, maybe?

Err I was referring to is removing perma-invisibility possible period

Yes you can remove the ability...

just before nulling things, remove the ability