How can you create a combo with Doomsday, Gush, Gitaxian Probe, Lion's Eye Diamond, Yawgmoth's Will, Laboratory Maniac?
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[START OF COMBO]This combo can be formed with Doomsday, Gush, Gitaxian Probe, Lion's Eye Diamond, Yawgmoth's Will, Laboratory Maniac

Color identity: UB
Mana cost: {U/P}{U/P}{B}{B}{B}
Steps:
  1. Cast Doomsday by paying {B}{B}{B}, searching your library and graveyard for Gush, Gitaxian Probe, Lion's Eye Diamond, Yawgmoth's Will and Laboratory Maniac, then exiling the rest of your library and graveyard, putting the aforementioned cards on top of your library in that order, and causing you to lose half your life total, rounded up.
  2. Draw Gush from the top of your library.
  3. Cast Gush by returning two Islands you control from the battlefield to your hand, causing you to draw Gitaxian Probe and Lion's Eye Diamond.
  4. Cast Lion's Eye Diamond by paying {0}.
  5. Cast Gitaxian Probe by paying {U/P}.
  6. Holding priority, activate Lion's Eye Diamond by sacrificing it and discarding your hand, adding {B}{B}{B}.
  7. Resolve Gitaxian Probe, causing you to look at a player's hand and draw Yawgmoth's Will.
  8. Cast Yawgmoth's Will by paying {2}{B}, allowing you to cast spells from your graveyard this turn.
  9. Cast Lion's Eye Diamond from your graveyard by paying {0}.
  10. Activate Lion's Eye Diamond by sacrificing it and discarding your hand, adding {U}{U}{U}.
  11. Lion's Eye Diamond is exiled instead of being put into your graveyard due to Yawgmoth's Will.
  12. Cast Gitaxian Probe from your graveyard by paying {U/P}, causing you to look at a player's hand and draw Laboratory Maniac.
  13. Gitaxian Probe is exiled instead of being put into your graveyard due to Yawgmoth's Will.
  14. Cast Laboratory Maniac by paying {2}{U}.
  15. Cast Gush from your graveyard by returning two Islands you control from the battlefield to your hand, causing you to draw two cards and win the game due to drawing from an empty library.[END OF COMBO STEPS]

Result:
  - Win the game[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Doomsday must be in your hand
  - Gush must be in the graveyard or in the library
  - Gitaxian Probe must be in the graveyard or in the library
  - Lion's Eye Diamond must be in the graveyard or in the library
  - Yawgmoth's Will must be in the graveyard or in the library
  - Laboratory Maniac must be in the graveyard or in the library
  - Your life total is at least 2.
  - You have a way to draw a card.
  - You control at least four Islands.
[END OF COMBO PREREQUISITES]
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