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I don't think Goliath is that OP'd. First you have to get Goliath's Spear and put it on Goliath, which doesn't happen every game, and then all your opponent needs to do is kill off Goliath to stop the negation of Hero SA's (granted, easier said than done, but still...). Goliath with his spear is no more OP'd than CoM or Assyria's Tribute.