Triggers and/or convert it into a flying unit possibly with a pre-defined height (as sort of mentioned before: used with metamorphosis). It's the unit itself that is flying, and impale makes units go up automatically. So just attach this and remove it right away as a special effect to make the ground go up with the unit.
DAMN you people are dumb...Why in the HELL would you need animations (besides one I'll tell below...)? He specffied what it is for. I actually think this is very useful. There aren't really any needed animations. Animations will just make the size go, for EXMAPLE, 1kb -> 2kb. There is ONE animation that would be nice, and it's a death animation. I'm pretty positive that if you were attaching it as an SFX and not a buff or ability, then it would take 5 seconds (after you ran the function) to actually disappear in game.
What kind of damn animations you want. Its an effect that you attach to a unit or as somone said impale. I used it by attaching it to the base of the farseer when he used a metamorphosis spell that made him flying, so essentially he is flying ontop of the rock.
