After the first Pro Tour, a player who ran two copies in his Top 8 deck declared that you could only compete in Standard if you played Land Tax or Necropotence
Get through the opponent's Blockers and Counters, and go for a win before they can play their large Characters.
Returning two artifacts or enchantments from your grave to hand is a nice burst of card advantage in the right deck
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I should state that Prime Time isn't a creature I have much experience with, so I don't know much about what other spells synergize with it best, but I have a gut feeling that what you've brewed could have better synergy with it
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