Rescue from the Underworld

The mechanic that pays off the underworld flavor with a literal trade: feed one creature to the grave and pull two back, the one you just killed and one already waiting there. The accounting is what makes it more than overpriced reanimation. The sacrifice is an additional cost, so it happens on cast with the spell still on the stack, but the bodies do not return until the beginning of your next upkeep. That delay is the balancing act, and it dictates how the card is used. A Reanimate or Animate Dead drops the threat immediately; this one telegraphs its payoff and asks you to bridge a single turn cycle. Because it is an instant, the tightest line is to hold it until the last window before your turn, collapsing that gap so both bodies arrive after you have already untapped and are ready to act. What redeems the tempo is the doubled bodies and the death triggers along the way. The sacrificed creature can be a value engine itself, dying for an aristocrat trigger on the way out and returning with an enters effect to match the card you reanimate. It rewards a board where creatures are worth more dead than alive, then briefly so again on return. The instant speed also lets it function as protection: sacrifice a creature in response to removal, and it comes back the following upkeep rather than being lost outright, with a second body riding along.