Life Outlet

Cards that treat your life total as a payable resource, trading life points for card advantage or other powerful effects. Necropotence and Greed pay life to draw, Bolas's Citadel lets you cast off the top of your library by paying life equal to mana value, and Phyrexian Arena bleeds you for steady draws. Aetherflux Reservoir converts a huge stockpile of life into lethal damage. Distinct from Lifegain Source, which adds life, and from Drain, which swings both totals at once; this set covers cards where YOU spend life as the cost. Note Aetherflux Reservoir appears in both: it gains life through its trigger and burns it as an outlet here.