So, someone with a cube of force activates one of the 5 'screen' options but before the minute is up changes to a different type of 'screen'...
Do you:
a) make them expend the points for the new screen?
b) make them expend the difference in points for the new screen (if the cost if higher)?
c) not bother with the issue until the next minute starts and have the player spend the new number of charges then ?
Do you:
a) make them expend the points for the new screen?
b) make them expend the difference in points for the new screen (if the cost if higher)?
c) not bother with the issue until the next minute starts and have the player spend the new number of charges then ?