Power Modifier

A power modifier is a metatrait, a collection of Enhancements or Limitations along with a specified Source.
GURPS Powers and GURPS Psionic Powers focus on this concept more, expanding from Basic Set.
It is possible to have TWO sources combined to price out a merged power modifiers. This is outlined in Stacking Power Modifiers on page 28 of Powers:
:No advantage can have multiple power modifiers.
:(Exception: A power can be both Elemental and Super.)
This would stack their modifiers to -20% and is mentioned at:
*124 for Cold/Ice
*125 for Darkness
*126 for Earth and Electricity
*129 for Heat/Fire
*134 for Sound/Vibration
*136 for Water
Category:Rules