decree of justice mana cost

[gobblor]

If I have a counterbalance and I were to reveal a decree of justice with it, What is the converted mana cost of the decree? becaus eit has x in it also.

[Sanguine Voyeur]

Four, X=0 anywhere except the stack.

[J.V.]

on the stack it will be whatever the caster paid for it.
Example:
making 2 angels 222WW=8
Making 1 Angel 22WW=6
etc etc