Fair call on the cost; I was looking mostly at middle values to simulate effects, not at abusability. For now, taking Hugh's suggestion of 10/d6 and limitation. Might go 5/d6 for Movement and 10/d6 for Attack.
For a lot of SFX, the target and their abilities has little to no effect on the duration. I didn't want to make it EGO and a mental effect by default because that might stop people from thinking of any other SFX.
BODY tends to be similar in most games. An Advantage or Limitation to change the affected stat is pretty obvious; maybe +1/2.
Thanks for the t