Permanent invisibility doens't have an icon, you could make a dummy ability for your hero, and when he learns it, add the permanent invisibility. To do this, modify a passive ability, for example bash, change all values to zero (with bash that would be the stun chance and extra damage), change the tooltip and icon to match your invisibility ability. Then use a trigger
a hero learns an ability
ability learned equal to permanent invisibility (dummy)
add ability permanent invisiblity (real) to triggering unit
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!