Wishclaw Talisman

The whole card is built around a single deferred cost: you get the tutor now, your opponent gets the artifact after. That structure makes it one of the cheapest, most flexible searches of its kind, because it charges nothing in life or exile and fetches any card, not just a creature or an instant. Demonic Tutor buys an unconditional search for the same mana value and hands nothing back; this one matches the flexibility, then pays for it by shipping the machine to someone who never wanted it. The catch is that the drawback is only a drawback if the game lasts. Give the Talisman away with two counters still on it and the opponent inherits a live engine; give it away empty, or after a turn that ends the game, and the downside evaporates. That tension is where the design lives. The clause restricting activation to your own turn is the leash: nobody can crack it on someone else's turn, so once the opponent takes control they cannot spend a counter until their own untap, and until then you have a window to reclaim the shell, race it dry, or simply win. It also opens a well-known loophole for tables that can steal the artifact back before the opponent taps it, or that simply do not care who holds a spent husk. Handing your opponent a loaded gun and daring you to fire yours first is a rare thing to price correctly, and this one prices it by counting turns.