Counter flux

[Richardalcala]

Can someone please explain {counter flux} I know it's a new card but how can you counter each spell for the overload cost. I am just confused does it last till the end of the turn or is it for the stack.

[Poof]

If the stack had a bunch of spells on it you can counter them all for example storm like others have mentioned

[Nobbert]

You can only counter spells, cards are only spells once they're on the stack.

[Maximo]

Counters all spells currently on the stack when it resolves.

[BlackJester]

Counters all spells currently on the stack when it resolves.

All spells YOU DON'T CONTROL. Yours go through unscathed.