The creature chosen to be sacrificed is still on the battlefield up through the time that you activate mana abilities
Protection : A creature with protection from one or more colors of magic cannot be affected by any magic of those colors
This mechanic interestingly enough was the original one I designed for Odyssey' s Mirari before the rules team told me that it would never work
Choose an expansion, and then stuff it in a bottle
One thing it wont work on, though, is Flayer of Loyalties: But thats fine, you dont need to cast this one for 0 mana, because once it comes out, all bets are off
Get ready for the big day by checking out the Magic: The Gathering FINAL FANTASY Card Image Gallery, where you can see all the cards and treatments from the set