How can you create a combo with Tawnos, Solemn Survivor, Retreat to Coralhelm, Forsaken Monument, Treasure Vault?
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[START OF COMBO]This combo can be formed with Tawnos, Solemn Survivor, Retreat to Coralhelm, Forsaken Monument, Treasure Vault

Color identity: WUB
Mana cost: {1}{W}{U}{B}
Steps:
  1. Activate Tawnos' second ability by paying {1}{W}{U}{B}, tapping it, sacrificing two artifact tokens and exiling Treasure Vault from your graveyard, causing you to create a token of Treasure Vault.
  2. When the Treasure Vault token enters the battlefield, Retreat to Coralhelm triggers, untapping Tawnos.
  3. Activate the Treasure Vault token's first ability by tapping it, adding {C}.
  4. Forsaken Monument triggers, adding {C}.
  5. Activate Tawnos' first ability by paying {2} and tapping it, creating a copy of the Treasure Vault token and causing you to mill two cards.
  6. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite landfall triggers
  - Infinite self-mill
  - Infinite tapped Treasure Vault tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Tawnos, Solemn Survivor must be on the battlefield
  - Retreat to Coralhelm must be on the battlefield
  - Forsaken Monument must be on the battlefield
  - Treasure Vault must be in the graveyard
  - Tawnos does not have summoning sickness.
  - You control at least two artifact tokens.
[END OF COMBO PREREQUISITES]
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