Card combos that end up to be victorious self-repeating patterns, but are unimaginably pointless to achieve.
I actually had that once...
I used to use a creatureless Mindgate deck against Top50. I have Enchant Artefact and Eternity and a Photon in my deck, the Top50 carried the Sanctuary. We would have ended up in a draw (field full of Ray of Lights and glowing dragons and Light Nymphs and Hope + Sanctuary + Shard of Divinity...) if it were not for the stupidity of the AI.