Thief. The Key to Magic, #7

Mar has become something more than a thief, more than a king, more even than a wizard-but power has not made his choices any easier. Across time, across empires, and across the fragile threads of cause and consequence, Mar walks a dangerous path. He can step outside the world, move through undertime, and reshape events-but every change carries a cost, and every victory leaves something broken behind.
When old enemies resurface and new threats emerge from both past and future, Mar is forced into a series of impossible decisions. A single misstep could unleash devastation across entire civilizations. A single delay could doom those he loves. And some problems cannot be solved with strength, magic, or even time itself. Around him, war gathers, alliances fracture, and lives hang in the balance-from desperate battlefields to forgotten corners of the world where fate quietly takes root.
Even those he tries to save may be shaped by consequences he cannot control. In a world where magic and time are intertwined, Mar must decide what he is willing to sacrifice-and whether the future he is fighting for is one that can truly be saved. Thief is a sweeping epic of power, consequence, and the burden of knowing too much, where even the greatest abilities cannot guarantee the right outcome.