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.
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.