Test of Endurance

One of three alternate win conditions in the same set, and the one that asks the most of its pilot. Where Battle of Wits counts cards and Epic Struggle counts creatures, this enchantment counts life, and fifty is a long way from twenty. The number is the entire balancing act: you cannot stumble into a win here the way you might with a forgotten board state, because pushing well past your starting total takes deliberate, dedicated infrastructure. Lifegain decks already gain life as a byproduct of their game plan; what this turns that incidental gain into is a clock, a reason to keep climbing past the point where extra life is normally just insurance against burn. The trigger sits on your upkeep, which means the opponent gets a full turn to interact: respond with the win pending, kill you, drop your life total back below the threshold, or destroy the enchantment before your next upkeep arrives. It does nothing the turn it resolves and announces its intent the moment your life crosses the line, so the deck built around it has to protect both the total and the permanent. That fragility is the cost of a win condition that does not require attacking, decking, or assembling a combo: just survival, patience, and a total that climbs and stays climbed.