River Song + Timestream Navigator
Produces: Infinite turns, Lock
- Color identity
- UR
- Mana
- {3}{U}{U}{U} each turn
Prerequisites
Timestream Navigator does not have summoning sickness. You have the city's blessing.
Steps
- During your upkeep, 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.
- Move to your draw step, drawing Timestream Navigator from the bottom of your library due to River Song.
- Cast Timestream Navigator by paying {1}{U}.
- Repeat each turn.
How to execute this combo
The "River Song + Timestream Navigator" combo takes 4 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.