Target Unit of Item?

When you use an item on an enemy unit, is there an action to detect that unit?

For example, you use an item on an enemy unit, I currently have it set to Show Experience of (Target Unit of ability being cast).

That doesn't work, but there's also not a (Target unit of item being manipulated)

Help anyone?

You could just trigger off the the item ability being used, rather than the item being manipulated.

item ability being used? What comparison is that under.

He means like for example your item does flame strike just make the trigger if a player casts a spell and make the condition spell equal to flame strike (or what ever you wanted)