The Promise of Kahless 
Sorcery
$0.58 #29391 0.0 years
You may sacrifice a Klingon or Warrior. If you do, return all other Klingon and Warrior creature cards from your graveyard to the battlefield.
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Cards similar to The Promise of Kahless expected a card that isn't here?
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Kor, Cause of Vengeance76%
$0.85↑#290960.0 years
"Whenever you attack, you may sacrifice another creature. If you do, draw a card, then Klingons and Warriors you control get +2/+2 until end of turn."