Extra Arms is a exotic physical advantage that is described on B53
Kromm in 2012Edit
- Eveything is at -4 for using multiple hands at once.
- You get one master hand and everything else is at -4 for the off hand.
- Thus, it's -4/-8/-8/-8. Anything worse and Extra Arms wouldn't be worth 10 points/level.
What isn't addressed is how to deal with other inherant non-extra limbs like legs or head and their possible involvement in DWA.