Combos Utilizing Black-Ward

put one ward of all five on one creature

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enchant infected vermin with black ward so that it does not take damage when you use vermin's ability

You protect the Harbinger with the Black Ward so you will kill off all other creatures

You play out the Wumpus with the ward and the fangs. Then you pay enough mana to kill every creature except itself.....

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use darkest hour to make all creatures black, then use the cop to protect your butt while giving your own creatures protection from black(other cards that do the same as black ward will work too)

enchant crypt rats with black ward so that it survives when you use the rats ability