While Captain Cold is active, your opponent must pay 1 to declare an attack.
Is that one Life or one Generic energy?
(The answer should be one Generic energy based upon the precedence set by all other cards released so far. I ask this question because it has been brought up in almost every draft in my major metropolitan area. I would like to suggest adding "Pay" to the lexicon of future rulebooks stating it is for energy and another keyword be established for costs involving Life Points.)