On the end step prior to your turn, cast Renounce by paying ({1} magic symbol) ({W} magic symbol) , sacrificing all permanents you control except Barren Glory, and causing you to gain two life for each permanent sacrificed this way.
Cast One with Nothing by paying ({B} magic symbol) , causing you to discard your hand.
At the beginning of your upkeep, Barren Glory triggers, causing you to win the game.
Results
Near-infinite lifegain.
Win the game at the beginning of your next upkeep.