Probably embarrassing, but I'll ask anyways. Single play as usual, my amazon is the only one who's ever gotten this far at Hell level: she's just killed the Summoner. Yay me. Now the Summoner dropped a "key of hate". What the blazes is that? I cannot trade it, so it says. Cain is very unhelpful too. And at first glance I can't find anything useful on the Arreat Summit. So - what do I do with it?