Hellcarver Demon | Doomsday | Barren Glory

(and two other cards)

Cast
Doomsday by paying ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) , searching your library and graveyard for any
Barren Glory,
Nexus of Fate,
Tormented Thoughts, and any two other cards, exiling all other cards from your graveyard and library, and then placing the remaining cards on top of your library in the order mentioned previously and losing half your life, rounded up.
Proceed to your combat phase, and deal combat damage to an opponent with
Hellcarver Demon.
Hellcarver Demon triggers, causing you to sacrifice all other permanents you control, discard your hand, exile the top six cards of your library, and allows you to cast
Barren Glory,
Tormented Thoughts, and
Nexus of Fate from exile without paying their mana costs.
Resolve
Tormented Thoughts, sacrificing
Hellcarver Demon and causing a player to discard a number of cards equal to
Hellcarver Demon's power.
Resolve
Nexus of Fate, taking an extra turn after this one and shuffling
Nexus of Fate into your library.
Proceed to your extra turn.
At the beginning of your upkeep,
Barren Glory triggers, causing you to win the game.