Delusions of Mediocrity and causing each opponent to create a token copy of it.
Each opponent's
Delusions of Mediocrity's first ability triggers, and your
Delusions of Mediocrity's second ability triggers, causing each opponent to gain 10 life and you to lose 10 life.
Cast
Sway of the Stars by paying ({8} magic symbol) ({U} magic symbol) ({U} magic symbol) , causing each player to shuffle their hand, graveyard and all permanents they own into their library, then causing each player to draw seven cards and set their life total to 7.
Each opponent's
Delusions of Mediocrity's second ability triggers, causing each opponent to lose 10 life.
Each opponent loses the game due to having 0 life.
Results
Each opponent loses the game.
Near-infinite lifeloss for all players.
Shuffle all hands, graveyards and permanents on the battlefield into their owner's library.