Conduit of Worlds + Shipwreck Dowser Combos

2 known combos featuring both cards in Commander

Infinite turns Lock

Combo 1 with Time Stretch + Ashnod's Altar

Results: Infinite turns · Lock
Steps
  1. Activate Ashnod's Altar by sacrificing Shipwreck Dowser, adding {C}{C}.
  2. Cast Time Stretch by paying {8}{U}{U}, causing you to take two extra turns after this one.
  3. Move to your first extra turn.
  4. Activate Conduit of Worlds by tapping it, causing you to pay {3}{U}{U} to cast Shipwreck Dowser from your graveyard.
  5. When Shipwreck Dowser enters the battlefield, it triggers, returning Time Stretch from your graveyard to your hand.
  6. Move to your second extra turn.
  7. Repeat.

Combo 2 with Time Stretch + Phyrexian Altar

Results: Infinite turns · Lock
Show steps
  1. Activate Phyrexian Altar by sacrificing Shipwreck Dowser, adding {U}.
  2. Cast Time Stretch by paying {8}{U}{U}, causing you to take two extra turns after this one.
  3. Move to your first extra turn.
  4. Activate Conduit of Worlds by tapping it, causing you to pay {3}{U}{U} to cast Shipwreck Dowser from your graveyard.
  5. When Shipwreck Dowser enters the battlefield, it triggers, returning Time Stretch from your graveyard to your hand.
  6. Move to your second extra turn.
  7. Repeat.
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