Crystal Shard + Inalla, Archmage Ritualist + Timestream Navigator

Mana needed: {4}{U}{U}{U}{U}

UBR identity

Commander legal

The 3 combo pieces

• Crystal Shard
• Inalla, Archmage Ritualist
• Timestream Navigator

What must be in place

You have the City's Blessing or have at least eight permanents on the battlefield.

How to execute it

1. Cast Timestream Navigator by paying {1}{U}.
2. Timestream Navigator enters the battlefield, triggering Inalla; pay {1} to make a token copy of Timestream Navigator with haste.
3. Activate the token 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.
4. Activate Crystal Shard by paying {U} and tapping it, returning the original Timestream Navigator to your hand.
5. Repeat each turn.

What the combo produces

• Infinite turns
• Lock