How can you create a combo with Cauldron Haze, Solemnity, Phyrexian Altar, Mnemonic Wall?
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[START OF COMBO]This combo can be formed with Cauldron Haze, Solemnity, Phyrexian Altar, Mnemonic Wall

Color identity: WUB
Mana cost: {1}{W/B}
Steps:
  1. Cast Cauldron Haze by paying {1}{W/B}, giving Archaeoamncer and at least one additional creature with base toughness two or greater persist until end of turn.
  2. Activate Phyrexian Altar by sacrificing Mnemonic Wall and the additional creature, adding  {1}{W/B}.
  3. When the creatures die, their persisit abilities trigger, returning themselves from your graveyard to the battlefield with zero -1/-1 counters due to Solemnity.
  4. When Mnemonic Wall enters the battlefield, it triggers, returning Cauldron Haze to your hand from your graveyard.
  5. Repeat.
  6. If you control an additional nontoken creature with base toughness two or greater, you may also sacrifice and return it to get infinite colored mana.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Cauldron Haze must be in your hand
  - Solemnity must be on the battlefield
  - Phyrexian Altar must be on the battlefield
  - Mnemonic Wall must be on the battlefield
  - You control at least one nontoken creature with base toughness two or greater.
[END OF COMBO PREREQUISITES]
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