Item spell help

HELP! I've been playing with editor for a long time to get this to work but no luck.

I have UNIT A to cast an item spell onto UNIT B. But I need a trigger that detects the spell triggering the UNIT B by that item spell. Any help would be helpful.

The event- starts the effect of an abillity works fine for almost every item, the condtion- abillity beign cast could check the abillity of the item.

Ok, but I need to detect the unit being casted on so I can put some more FX on the unit.

The function "target unit of abillity beign cast" should work.

Where would you find that function? In the Event, Condition, or Action?

It's a function. Whenever you're filling out a Unit value, you'll find it in the Functions menu—Event Response - Target Unit Of Ability Being Cast.