Jinxed Ring

A hot-potato artifact built around an inverted incentive: it punishes you for the very thing most decks want to do, then hands you the means to ship the punishment to someone else. The damage trigger fires off any nontoken permanent leaving the battlefield for your graveyard, so the more attrition your deck generates (blocking, removal trades, sacrifice value) the faster the ring bleeds you. The escape route is the sacrifice clause, which turns the ring into a liability you can transfer at the cost of a creature, and the indefinite control change means the ring keeps ticking on its new controller's permanents instead of yours. This is a Tempest-block "give-the-bad-thing-away" artifact in the lineage of cards that make ownership a hazard, and the design stays honest about that genre by pricing the exit. You can only hand it off by feeding it a creature, and every permanent that dies on your side while you hold it costs a point of life. It rewards a deck that wants to push damage at any cost and treats its own board as ammunition. As a curio it captures a very specific 1998 design instinct: build a clock that points back at its controller, then make the only way out cost something real.