Problem with dummy ability

Im making evasion aura and I create the levels with dummy ability, and add them to the units in range of the aura. The dummys have no icons or tooltip, but in game you can see the icon green like happens if the icon is missing and you can see the tooltip is:"Tooltip missing!" I want it to be like the permanent invisibility for the feral spirit wolfs, there you an see no icon or tooltip. Well I hope you can help me , thanks

No-can-do, showing of icons is something inherent to abilities themselves. You can't have an evasion ability without an icon (if you don't put any icon, the game will give you the green square of death), the same way you can't have the permanent invisibility with an icon (but that can be corrected with dummy abilities)

In the gameplay interface menu there is a path for a blank.blp. Find it and use it as the ability icon. The tooltip will still appear when he palyer mouses over that tspot though.