Soul Echo

A negotiation engine disguised as a defensive enchantment, and one of the stranger life-total interventions ever printed. The core idea is that it severs the link between zero life and losing the game, then hands the bleeding edge of that exemption to your opponent as a choice. The echo counters function as a separate, finite life pool that your opponent gets to drain in place of your real one: each point of damage that would be dealt to you can be redirected to peel a counter instead. The friction is built into the timing window. The redirection lasts only until your next upkeep, and the opponent re-decides each turn whether to spend their damage chipping at the counters or to ignore them and swing your actual life total into the negatives where, thanks to this card, you simply sit. The day the counters run dry, the enchantment sacrifices itself and the death rule snaps back into force. It is a card built around a question with no clean answer, which is why it reads more like a puzzle box than a defensive tool: the X you pay is a wager that you can win or stabilize inside the runway it buys, and the opponent's every attack becomes a calculation about whether killing the enchantment or killing you is the faster path. Plenty of designs from this era leaned on clever, conditional triggers; few committed as hard to making the opponent the decision-maker.