The Ability to Adjust the Cost of an Ability/Feat
This is a Multiple Proposal for tackling the same issue:
1) Makes a New Tag
2) Expands the existing COST tag.
Not sure how to easily do this however my proposals.
NEW TAGs (Proposal ideas)
==
ADJUSTABLECOST:x[|DEFAULT=y,MIN=y,MAX=z]
- X = YES
 - X = NO
 
Optional
- Y = DEFAULT Cost
 - Y = MIN Cost Possible
 - Y = MAX Cost Possible
 
- Description:
- Used to change the cost of the ability when taken, unless the optional values are used, the Cost may be any negative or positive integer.
 
 
Default is no.
- Example of Usage
 
- ADJUSTABLECOST:YES|MIN=3,MAX=10
- When taken the Cost may be changed to 3 to 10, if canceled the cost will be unchanged.
 
 
==
PROPOSAL #2
Alternatively, let's modify the actual 'COST' tag
COST:x[x,y,y]
X = Default Cost (No Change Needed)
Optional
- Y = MIN Cost Possible (Number, variable or formula)
 - Y = MAX Cost Possible (Number, variable or formula)
 - Y = Selection Choice
 
Example of Usage: COST:1,MIN=1,MAX=3
Cost of the Ability is 1, and may be changed to 2 or 3.
COST:10,MIN=*1/2,MAX=20
Cost may be 5 to 20
COST:10|5,3,20
Cost can be 3, 5, 10 or 20