I had a fun UB reanimator casual deck that ran Living End and Sins of the Past. It sounds clunky (and kind of was), but I ran a ton of looter type effects and being able to toss Living End to use later worked better than you might think. It also let you get extra mileage out of other reanimation spells if say you just need Bogardan Hellkite to come back to life one more time, etc.