Covetous Castaway // Ghostly Castigator

Two halves that disagree about what the graveyard is for. The Human front feeds it: dying mills three cards, seeding delirium, flashback, escape, or whatever self-mill payoff you happen to be running, while also stocking the very card that will come back. Then Disturb inverts the plan. Cast the Spirit from the graveyard and its enter trigger offers to shuffle up to three cards from your graveyard back into your library, pulling fuel out of the pile the front side just packed. One half deposits on death; the other withdraws on arrival, and the withdrawal can walk back a specific loss (a bomb you milled away, a card worth redrawing rather than leaving to rot). The exile-instead clause on the Spirit caps the whole exchange: Disturb spends the card for good, so you get exactly one flip and one shuffle, never a repeating churn. What lifts it past ordinary two-sided value is the split timing and opposite direction. The fill is not yours to refuse: death mills three whether you want the fuel or not, so the front is a commitment, not a choice. The choice is deferred to the back, where the shuffle asks you to decide, at a later moment and in the reverse direction, how much of that deposit to reclaim. A common that forces the deposit and lets you negotiate the withdrawal is doing more structural work than its 1/3 body advertises.