Kaya's Ghostform

Reanimation usually costs real mana and asks you to fill a graveyard first; this rewrites the sequence by paying the resurrection tax up front. For a single black mana you pre-purchase a return trigger on a permanent you already control, and the payoff fires on death or exile: two of the most common ways a permanent leaves the battlefield. That exile clause is the reason it beats a plain sacrifice engine, since it answers removal that would otherwise sidestep a graveyard return entirely. The strategic axis it opens is the enters-the-battlefield loop: enchant a creature whose value is front-loaded on arrival, then convert every death into a fresh entrance rather than a loss. It attaches to planeswalkers too, which lets a walker you would otherwise lose to combat or a burn spell come back with a full loyalty reset. The tension the card resolves is timing. Traditional reanimation is reactive and expensive, spent after the creature is already gone; this commits the mana in advance and makes the recursion automatic, with no spell on the stack for the opponent to answer at the moment of return. The Aura itself is the vulnerability: it is a permanent that can be answered before the enchanted creature ever dies, and the return brings the card back without the enchantment attached, so the loop is deliberately single-use unless you rebuild it. Lose control of the enchanted permanent and the Aura simply falls off, no return owed.