Duel of Fates

Each player shuffles their library, then exiles their entire library except for the very bottom card. Then, clash with target opponent. The losing player loses the game, and the player that wins the clash gains 5 life. Each other player shuffles cards they own in exile back into their library. Then, exile Duel of Fates.
When Fate's cruel waters fill your lungs, a single act of desperation can turn the tides.