Counter flux

[average_j03]

If you overload counterflux, would you only be able to counter each spell cast that turn? Or all opponents turns? Or does this include permanents on the board?

[Willthomjr]

{counter flux}

You can only counter spells. So they would have to be on the stack to be targeted.  After a spell resolves its no longer a spell, it's either a card or a permanent.