How can you create a combo with Laboratory Maniac, Phyrexian Devourer?
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[START OF COMBO]This combo can be formed with Laboratory Maniac, Phyrexian Devourer

Color identity: U
Mana cost: 
Steps:
  1. Activate Phyrexian Devourer by exiling the top card of your library.
  2. Repeat step 1 until you have an empty library.
  3. Resolve a Phyrexian Devourer ability, putting a number of +1/+1 counters on it equal to the exiled card's mana value.
  4. If Phyrexian Devourer has a power of at least seven, it triggers, causing you to sacrifice it.
  5. Repeat steps 3-4 until you sacrifice Phyrexian Devourer, thus causing all remaining Phyrexian Devourer abilities to fail to resolve due to having no legal targets.
  6. Draw a card, causing you to win the game due to drawing from an empty library.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - You have a way to draw a card.
[END OF COMBO PREREQUISITES]
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