I would like it to where you could either chose a couple curse you would want to be blocked or if that would be to hard to script then maybe be done by turns. Hence, I want it to block voodoo that takes x many turns or more to cast on you.

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-1.

Otherwise players would just set it to Serenity when having Mindbars on, you have to take a chance that it will block a good card rather then floods.

Nice first suggestion though!

I agree with Avery. It is a nice suggestion, but I fear it would make countercurses too strong.

I agree with Avery & Haron. Maybe for every additional 50 or 75 turns spent it blocks an additional curse. Makes it more useful but costly.