Towers + Black Arrow

I'm trying to make a tower use the 'Black Arrow' ability from an item, but when I try it adds the damage bonus but doesn't spawn any skeletons. I tried changing the towers building classification to false, but that had no effect.

Make a tower.. Create a new ability based of Dark Ranger's black arrow, set the 'Hero Ability' to false, add it to the tower there you go. But you have to click the tower and manually right click the black arrow, or use some triggers to do the right click for ya.

No, this isn't what I want. I want it to work like the item Orb of Darkness works.

Make sure you set the 'Item Ability' to false, other than that it should work.

The Orb of Lightning ability (which is what this is.) had a balance change made awhile back so that the orb ability (Summon skeletons, purge ect) only fired if the unit with the ability was expressly told to attack the target. If you tell the tower to right click on the target it should work, if it doesn't then you've made a mistake somewhere, you can also try a no mana cost autocasted black arrow.