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you guessed it, three

You can also go and find it pre-emptively (whenever your Saga goes off) and still have it around for when its needed

Black offers you so many options for exchanging resources for power, and Toxic Deluge offers an extremely efficient sweeper at the cost of some of your life total

When it comes to protecting your board, few cards do the job as well as this one (though unlike Teferi's Protection, it gives no such security to your life total)

Three of my friends are using or have used a variety of programs

DISCLAMER : Backs of cards may vary in quality and design, I will always replace a card for free if the front arrives at all damaged