the front side of Timestream Navigator
the back of a classic MtG card
the front side of Riptide Laboratory
the back of a classic MtG card
the front side of Archmage of Echoes
the back of a classic MtG card

Color Identity: U

Initial Card State

  1.  Timestream Navigator in hand.
  2.  Riptide Laboratory and Archmage of Echoes on the battlefield.

Notable Prerequisites

  1. You have the city's blessing, and/or control (at least) eight permanents.

Mana Needed

  1. ({1} magic symbol)  ({U} magic symbol)   available the first turn, with ({4} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  ({U} magic symbol)   each following turn available.

Steps

  1. Cast Timestream Navigator by paying ({1} magic symbol)  ({U} magic symbol)  .
  2. Archmage of Echoes triggers, copying the Timestream Navigator spell.
  3. Resolve both Timestream Navigator spells.
  4. If you don't have the city's blessing, either the Timestream Navigator token or the nontoken Timestream Navigator gives you the city's blessing.
  5. During your next turn, activate Riptide Laboratory's second ability by paying ({1} magic symbol)  ({U} magic symbol)   and tapping it, returning the nontoken Timestream Navigator to your hand from the battlefield.
  6. Activate the ability of the Timestream Navigator token by paying ({2} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  , tapping it and putting on the bottom of your library, causing you to take an extra turn after that one.
  7. Repeat.

Results

  1. Infinite turns.

Metadata

  1. In 2279 decks according to EDHREC.
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