[Leaf_It]

Shifting Shadow is too low of a D20 roll for a common that can easily get a boost to that roll. 50/50 is a pretty good chance in heroscape, and I think that you should be aiming for the average requirement to be that 50/50 chance. I imagine that since these guys are serving the same purpose as Gladiatrons, they are your front line, which means that they are at the center of the action. Since all the shadows get boosted by being near each other, and most of the shadows are melee, getting +2 is not uncommon. This is a long winded way of saying that it should be a 12 -13 or higher, and not a 10 or higher.

You could also do the opposite of the Gladiatron route, and give additional defense, but based on the adjacent shadows. That would avoid Isamu/Spiderman issues.