Gifts Given totes a nearly identical effect to Gifts Ungiven, save for one major difference: while Gifts Ungiven has a player search their own library for four cards, allowing an opponent to chose two of those cards to be put in that player's hand, Gifts Given Reverses this process
My favorite equipment for it gives it haste and vigilance, like Sword of Vengeance or Haunted Cloak
That means ProgenitusProgenitus goes right back into your library, only to return again later
They do come with a stiff drawback over a basic land however they need not even be made when you are flush with lands and so never really hurt you with their coming into play tapped
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I now consider it an honorary piece of power along with Tolarian Academy, Mana Drain and the like), it was good in every deck and oppressively good in this archetype specifically