Muldrotha, the Gravetide + Timestream Navigator Combos

5 known combos featuring both cards in Commander

Infinite turns Lock

Combo 1 with Cellar Door

Also requires: Cellar Door Cellar Door
Results: Infinite turns · Lock
Steps
  1. Activate Timestream Navigator by paying {2}{U}{U}, tapping it and putting it on the bottom of your library, causing you to take an extra turn after this one.
  2. Activate Cellar Door by paying {3} and tapping it, causing you to put Timestream Navigator from the bottom of your library into your graveyard and create a 2/2 Zombie creature token.
  3. Cast Timestream Navigator from your graveyard by paying {1}{U}.
  4. Repeat each turn.

Combo 2 with Llanowar Elves + Prime Speaker Vannifar

Results: Infinite turns · Lock
Show steps
  1. Activate Timestream Navigator by paying {2}{U}{U}, tapping it, and putting it on the bottom of your library, taking an extra turn after this one.
  2. Activate Llanowar Elves by tapping it, adding {G}.
  3. Activate Prime Speaker Vannifar by tapping and sacrificing Llanowar Elves, searching for Timestream Navigator and putting it onto the battlefield.
  4. Cast Llanowar Elves from your graveyard by paying {G}.
  5. Move to your next turn.
  6. Repeat.

Combo 3 with Cynical Loner

Also requires: Cynical Loner Cynical Loner
Results: Infinite turns · Lock
Show steps
  1. Activate Timstream Navigator by paying {2}{U}{U}, tapping it and putting it from the battlefield onto the bottom of your library, causing you to take an extra turn after this one.
  2. Declare Cynical Loner as an attacker, or tap Cynical Loner by any other method.
  3. At the beginning of your second main phase, Cynical Loner triggers, causing you to search your library for Timestream Navigator and put it into your graveyard.
  4. Cast Timestream Navigator from your graveyard by paying {1}{U}.
  5. Repeat each turn.

Combo 4 with Isochron Scepter + Entomb

Results: Infinite turns · Lock
Show steps
  1. Activate Timestream Navigator by paying {2}{U}{U}, tapping it and putting it from the battlefield onto the bottom of your library, causing you to take an extra turn after this one.
  2. Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Entomb without paying its mana cost.
  3. Resolve Entomb, searching your library for Timestream Navigator and putting it into your graveyard.
  4. Cast Timestream Navigator from your graveyard by paying {1}{U}.
  5. Repeat each turn.

Combo 5 with Riptide Shapeshifter

Also requires: Riptide Shapeshifter Riptide Shapeshifter
Results: Infinite turns · Lock
Show steps
  1. Activate Timstream Navigator by paying {2}{U}{U}, tapping it and putting it on the bottom of your library, causing you to take an extra turn after this one.
  2. Activate Riptide Shapeshifter by paying {2}{U}{U} and sacrificing it, naming any of Timestream Navigator's types, and then revealing Timestream Navigator from your library and putting it onto the battlefield.
  3. Move to your next turn.
  4. Cast Riptide Shapeshifter from your graveyard by paying {3}{U}{U}.
  5. Repeat.
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