13 Unwinding Clock If you're all in on an artifact deck, Unwinding Clock can keep your creatures on the defensive and give your other artifacts additional activations
While its easy to use Declaration in Stone poorly (since it gives them card advantage), its going to have a big impact on our desire to play multiple copies of the same creature at the same time
You can look at the top card of your library whenever you want (with one restriction
Spells with split second only prevent new spells and activated abilities from going on the stack until those spells resolve, but once the spell with split second resolves, you're free to interact normally with any other spells on the stack
(8/25/2017) If your untap step is somehow skipped as your next turn begins, your phased-out permanents won't phase in until the next untap step you actually have, but you'll no longer have protection from everything and your life total can change again
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