Day 25 – Favorite Magic Item
This one changes with each edition. In the AD&D days, it was an item called the Slate of Identification. I know identifying magic items was part of the mystery of the game, but in my experience, it only served to obfuscate bog-down the game at best or reinforce that DM vs. Player mentality at worse. I often gave this out just to skip that part and get back to the adventure. Flaming swords are always cool, or any weapon you want to put an effect like that one.
One item always stands out though, one I often threaten to pull out, but have only done so twice. The first time I used it, it wrecked the campaign. The second time, I did it deliberately to end the campaign (which it did). Of course, I refer to the Deck of Many Things. It’s a magical card deck from which characters can draw a pre-specified number of cards. Some cards grant wishes, gold, or power. Others summon Death to attack you or magically imprison you, or worse, send your soul to another dimension, leaving your still-breathing shell behind, unable to do anything.