mtg special edition cards $4000 LOTR Collector Opening Its owner puts it on the top or bottom of their library Magic The Gathering Secret Lair

Dealing damage every time a player casts a non-creature spell could turn into quite a big number if you're playing opposite decks that don't have a lot of creatures

Wrong Back or Mixed Cards Every now and then, sheets from different games get mixed up at the factory, leading to legendary oddities like a Pokmon card printed with a Magic back

Storm decks are fun for the person playing them, that I cannot deny (and I myself have played a few)

(2012-10-01) Effects that state that the enchanted land doesnt untap during your untap step wont apply during another players untap step

If I had to pick any of them to take the slot, it would be Black Lotus