What combo, rune or battlegroup had a typical "five minutes of fame" before the sledgehammer came down? I remember draksar bookburner pretty much stopping your opponent from casting spells forever. It was glorious
High Warlock when he was able to use Cast: Repurpose on enemy champions who was Possesed(via ability or Domi)
Recently, when sacrifice and retribution worked on Polluted Martyr before he received bloodless, I did some fun stuff with that.
Firk Botanist + Dragon Claw springs to mind. There were certainly other aspects to that annoying SL/FS bg, but that is the one I always recall with the most loathing.