
They cost 40 points each (160 if passive).
Basically, you make an Uber sig attack, or multiple useful sig attacks, then make yet another signature that:
Passive Version: Reduces the CD of any (as in, you get to choose) previously used Sig Attack (as in it's cooling down right now) by 1 TCD every turn without using any actions.
(YO! Demonstar! THIS is how you make 0 TCD actives without actually breaking the rules. :P)
Active Version: Reduces the CD of one or more (You still get to choose! Imagine that!) previously used Sig Attacks (that are currently cooling down) by 1 TCD per 40 points at the cost of 1 action. You can literally use one sig with as many as a dozen (or more if you nerf yourself) sig cooldown reducers to instantly reduce another sig's CD.
I would like to note that each use of Sig Chill (for your signatures) or Heatsink (for someone else's signatures) only reduces the CD of A selected sig by 1. So, the more Sig Chills or Heatsinks you have, the more TCD you can make go away. Like damage, however, if you want to cool down multiple sigs, you have to split the effect. How you split the effect is up to you.
There is one proviso: You must wait until the next turn to use a signature that has had its cooldown negated. You cannot use the same sig twice in the same turn.
Yes, this really is allowed. Enjoy.
