With Platinum Angel safely on the battlefield ensuring that "you can't lose the game," you are entirely insulated from the traditional consequences of having zero or negative life. This absolute protection creates a gruesome playground where Necropotence can run wild during your upkeep, letting you aggressively bleed your own life total down to zero (or lower) one payment at a time. Once you've successfully drained yourself to the absolute brink, you spring Magus of the Mirror's activated ability to seamlessly swap your hollow life total with an unsuspecting opponent, immediately forcing them to inherit your zero life and lose the game on the spot.