Affects Insubstantial

Affects Insubstantial (B102; +20%) aka AIS is an enhancement that can be taken on attacks and other abilities. It's already built into Malediction which works on all types of foes and takes either Not Substantial or Not Insubstantial limitations to remove it.
==Wastd points==
One important thing to keep in mind (say you have a "ghost busting ability" you can use in physical form) is that this enhancement is of lesser value when one is insubstantial
per B63:
*"your physical and energy attacks cannot affect physical opponents"
**"Your physical and energy attacks affect other beings using the same form of Insubstantiality, and their attacks affect you."
The most straightforward way to save points (assuming just 1 type of insubstantiality in the game) is to use Limited Enhancements.
*Accessibility establishes "only while invisible" and "only while insubstantial" is -10%
**later Only While Substantial was ALSO assigned to be -10%
***so: applying Only While Substantial to Affects Insubstantial would turn that off when you turn insubstantial (when you don't need it)
****this -10% would obviously be a point crock for characters who can't normally turn insubstantial as that would rarely limit them unless they had allies who could turn them insubstantial
==Alternative Enhancements==
This enhancement has usefulness because you would require it to hit those using DIFFERENT forms of insubstantiality
*sadly most templates don't go to the effort of specifying types of insubstantiality (as elaborated in Powers) as they often do for Invisible or See Invisible (which are usually, but not always, specified)
The simplest solution might be to have each different type of insubstantiality be targeted by different +20% enhancements. Someone who wanted to target two kinds of insubstantial simultaneously could pay +40%, or if he wanted to toggle the option, pay +25% for Alternative Enhancements
This probably is not RAW though, where AIS is meant to apply to ALL types.
In that case the question is how to legally and fairly save points since you can already affect your own type for free when insubstantial.
Possible Aspected could make sense. -20% for "only one type of insubstantial" would reduce this to a +16% enhancement
*Not Aspected being +20% would be reduced to +16% if aspected itself (this is Either/Or Limitations applied to an enhancement instead of an advantage).
**That's a net -4% modifier which is too small (-1% per +25%) to actually save points on a +20% enhancement
One College guidelines in Thaumatology T42 (One-College Magery With Variant Colleges) guide the alteration of the value based on available colleges, which could be used here:
*-10% if there are two colleges
*-20% if three to six
P55 notes that appearance/impediments vary by origin and P56 lists 4-6 types 
==Supers==
Pg 34 mentions for Substantial Only:
:You have an attack or other ability that normally works on both substantial and insubstantial opponents, such as a Malediction.
This implies Malediction has Affects Insubstantial inherently.
==Protection and Warning Spells==
Pg 13 for Utter Dome it is applied to Damage Resistance with Area Effect.
Pg 14 for Utter Wall it is applied to an Innate Attack with Wall to allow the wall to stop insubstantial creatures.
B63 mentioned:
:The GM may rule that certain materials, energy barriers, magic spells, etc. are impenetrable to your particular form of Insubstantiality.
This clarifies the issue.
==quotes==
===PK===
2008 http://forums.sjgames.com/showpost.php?p=637012&postcount=11
Adding Cosmic to your Insubstantiality only removes certain built-in limitations, such as not being able to enter areas which are walled off against spirits and such. It doesn't make you somehow immune to attacks with Affects Insubstantial.
===Kromm===
2014 http://forums.sjgames.com/showpost.php?p=1849574&postcount=8
:Originally Posted by Adelus
:2) I'm wondering about the necessary traits someone would need to affect the insubstantial without being able to turn insubstantial themselves. If someone buys Affects Insubstantial as a modification to their ST-based attacks, does that also permit them to grapple, hold, and pin Insubstantial entities? Is there a better, or more elegant way I'm missing to allow for Man vs. Ghost Cage Matches?
That's just an application of Modifying ST-Based Damage (Powers, p. 146). Affects Insubstantial is one of the first examples there. As those rules point out, enhancements benefit kicks, punches, and other unarmed melee attacks . . . and grapples are considered "unarmed melee attacks."
*this relates to Inbetweeners in GURPS Voodoo as pointed out in http://forums.sjgames.com/showthread.php?p=1847161
==See also==
*Affects Substantial
*Insubstantial Only
*Only While Insubstantial
Category:Enhancements