Competitively speaking, Urim and Thummim. It goes into just about every Judges deck I build with Eli the Priest and Aaron. It's also kinda lame though cuz it takes away from the strategy if you can know exactly what to attack with every turn for effectively zero cost.
My overall favorite is probably Stalks of Flax. I think it's pretty underrated but it was definitely in some of the older versions of my Judges decks that ran Gideon, Samson, and David who didn't have much of a chance at giving my opponent an advantage. I did run it at Nats this year as a CoL counter but I never played one a CoL deck. It was nice to grab some Music Leaders and banding Heroes.