Okay here's mine.
Name: Cloud (just use the same icon, doesn't matter)
Levels: Just 1
Type: Target area, non-channeling, not MUI, JASS/GUI (whichever you prefer)
What it does: Summons a cloud of fog so thick that the units inside are confused and attack any other unit, whether it is in the cloud or not, and irrespective of whether it's friendly or foe. If a unit leaves the cloud, then it attacks units like normal. Duration: 15 secs.
Tell me if you need any more info.