Run Animation During Hero Ability?

What I am basically trying to do, is have my custom hero animated during cannibalize. Right now, he just stands there while cannibalizing.

I tried creating a trigger, but I can't seem to set a condition that will recognize a unit or hero doing a custom ability.

How would I go about getting my hero to animate during cannibalize? Thanks!

what model you using? Because the stand channel animation is used for spells which much be channeled (this includes canibalise) use this animation