The best protection for your slivers. Forget the other guys. This is it. Run a couple of counters, just in case, and go to town. If you want a Ward Sliver to make your jerk army harder to block, fine, but you want this to keep the pretties safe leading up to the kill shot. Just have Magma Sliver and a sacrifice outlet (There's a sliver for that!) to retire the Crystalline when you've had your fill of sweet, sweet dread, wafting over from the other side of the table. Yes. They're evil. As long as it's never the only deck you bring with you, your soul can still be saved. 5/5