Case of the Stashed Skeleton

The clever twist in this Case's construction is that its own entry trigger manufactures the obstacle it demands you clear. The Skeleton arrives suspected, and the solve condition asks you to control no suspected Skeletons, so the design hands you a menacing 2/1 attacker and then makes disposing of it the price of the tutor. Suspect is doing double duty here: it hands the token menace on offense while stripping its ability to block, so the body you were given cannot be quietly parked as a defensive chump. Your outs are all forward-facing. Send it in and let it die in combat, feed it to a sacrifice payoff, or scrub the suspect flag off it so the Case registers as solved. That solve happens automatically at your end step once no suspected Skeletons remain, converting a two-mana enchantment into a delayed, unconditional tutor for one additional and the Case itself. Search your library for any card, put it into your hand, sorcery-speed only: that is a generous ceiling for an effect this open-ended. The sequencing tax is what holds it down. You pay twice (once to deploy, once to activate), you field a body you may not want and cannot use to soak damage, and you wait at least a turn cycle before the payoff lands. It is a tutor dressed as a whodunit, where the mystery is how fast you can remove the evidence you were forced to create.