I know the refs like to review variable arrays on a case-by-case basis, so I think this is the best place for something like this.
I was thinking of having Stygwyr expand more on his blood powers by mimicking the biological/magical powers and abilities of those who he has injured.
What in mind was something like this:
Mimic # (All traits at once, Extra Subject [+1], Stacking [+1], Channeled by Blood [-1], Biological or Magical powers only [-1], Only from target that Stygwyr has injured [-1], Tainted [-1], Limited: Only organic creatures with blood [-1 pp])
Would that be ok?