Timestream Navigator + Riptide Laboratory + Inalla, Archmage Ritualist
Produces: Infinite turns, Lock



- Color identity
- UBR
- Mana
- {5}{U}{U}{U}{U} each turn
Prerequisites
You control at least nine permanents or have the city's blessing.
Steps
- Cast Timestream Navigator by paying {1}{U}.
- Timestream Navigator enters the battlefield, triggering Inalla, causing you to pay {1} to create a token copy of Timestream Navigator with haste.
- If you do not have the city's blessing, Timestream Navigator triggers, giving you the city's blessing for the rest of the game.
- Activate Riptide Laboratory by paying {1}{U} and tapping it, returning the nontoken Timestream Navigator to your hand from the battlefield.
- Activate the token 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.
- Repeat each turn.
How to execute this combo
The "Timestream Navigator + Riptide Laboratory + Inalla, Archmage Ritualist" combo takes 6 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.
The end result: Infinite turns, Lock.
Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.
The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.