![Height Advantage](/bundles/cards/28027.jpg)
Ngl, this is a very niche card that is hard to justify putting in your deck. Vision can squeeze some use out of it but bumping his Intangible form damage reduction to 3 damage instead of 2. And that is nothing to scoff at doing just generic villains and minion. Yes, you have to play it and it goes away but it works when you need that extra damage reduction in Intangible. You can take minion hits that would hit your allies and they'll love you for it. Still situational but could easily work.
Maybe I'm not creative enough but I can't seem to find any other types of characters or protection archetypes simply because a -1 damage is kinda small. You could play x3 in a row and -3 damage for the entire turn but even if you do that, that is -3 damage reduction for 1 turn and one whole cycle of your deck. Maybe someday, there will be a hero that will have built in damage reduction (Luke Cage?) but I don't think he would have aerial in the first place.
Anyways, there are better cards out there, that are not trait locked that are in protection. I wonder if it would be more useful is it was a -2 DR or a -3DR for 2 Cost.