Command the Dreadhorde and The Wanderer are both solid cards on their own. Standard players are having success casting Command the Dreadhorde for value and just absorbing the damage it deals. The Wanderer hasn't appeared in many Standard decks yet, but it's great for shutting off burn decks or sniping control decks' finishers.
Put these two cards together however, and you get to Reanimate every creature and planeswalker in both graveyards for six mana and 0 damage. That's a game-ending combo that just happens to be budget.
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