How can you create a combo with Mnemonic Wall, Cache Raiders, Time Warp?
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[START OF COMBO]This combo can be formed with Mnemonic Wall, Cache Raiders, Time Warp

Color identity: U
Mana cost: {7}{U}{U}{U} each turn
Steps:
  1. Cast Time Warp by paying {3}{U}{U}, taking an extra turn after this one.
  2. Cast Mnemonic Wall by paying {4}{U}.
  3. Mnemonic Wall enters the battlefield, returning Time Warp from your graveyard to your hand.
  4. At the beginning of your next upkeep on your extra turn, Cache Raiders triggers, returning Mnemonic Wall from the battlefield to your hand.
  5. Repeat each turn.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Mnemonic Wall must be in your hand
  - Cache Raiders must be on the battlefield
  - Time Warp must be in your hand
[END OF COMBO PREREQUISITES]
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