How can you create a combo with Merfolk Secretkeeper // Venture Deeper, Underworld Breach, Ashnod's Altar, Mycosynth Lattice?
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[START OF COMBO]This combo can be formed with Merfolk Secretkeeper // Venture Deeper, Underworld Breach, Ashnod's Altar, Mycosynth Lattice

Color identity: UR
Mana cost: {2}
Steps:
  1. Cast Venture Deeper from your graveyard for its escape cost by paying {1} and exiling three other cards from your graveyard, causing you to mill four cards and then exiling Venture Deeper.
  2. Cast Merfolk Secretkeeper from exile by paying {1}.
  3. Activate Ashnod's Altar by sacrificing Merfolk Secretkeeper, adding {2}.
  4. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite self-mill
  - Near-infinite death triggers
  - Near-infinite enters the battlefield
  - Near-infinite leaves the battlefield
  - Near-infinite magecraft triggers
  - Near-infinite mill
  - Near-infinite sacrifice triggers
  - Near-infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Merfolk Secretkeeper // Venture Deeper must be in the graveyard
  - Underworld Breach must be on the battlefield
  - Ashnod's Altar must be on the battlefield
  - Mycosynth Lattice must be on the battlefield
  - You have at least three other cards in your graveyard.
[END OF COMBO PREREQUISITES]
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