Curious Cadaver

The recursion here is keyed to a specific verb: sacrifice a Clue, and this comes back from the graveyard to your hand. Since cashing a Clue for a card is itself a sacrifice, every routine investigate payoff doubles as a resurrection trigger, so a deck built to churn through Clues is also, incidentally, a deck that keeps handing this 3/1 flyer back. That coupling is the whole design. The body is deliberately brittle: one toughness folds to nearly any interaction, and a durable creature stapled to a repeatable, resource-neutral loop would be oppressive. That single point of toughness is the tax that keeps the engine fair, because the card wants to die: chump a swing, feed a sacrifice outlet, block and trade, then draw the next Clue-sacrifice trigger and start over. Where other free-return creatures charge mana or life for the privilege, this one asks nothing beyond a resource you were already spending. Its leash runs entirely through your Clue supply, and sacrifice is a narrower gate than it looks: a Clue that gets destroyed or exiled never triggers anything, so the loop is only as fast as your ability to generate tokens and voluntarily crack them. In a deck that never touches investigate, it is a flying beater with a dead line of text.