While this might seem like a bad thing at first glance, Displace Kitten actually provides you with more flexibility regarding when to flicker your creatures than any other card on this list
No one can really agree on what power level means
Then you can tap it with three and exile a card from any graveyard - ideal to hose foes
Still, there are some great cards in here, and a few cards to help you get more creatures out like The Five Arrive (a reprint of Genesis Ultimatum), copy them (Quantum Misalignment), remove threats individually (Path to Exile), or wholesale (Cleansing Nova)
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Now they both have an enters-the-battlefield effect as well