Grenzo, Dungeon Warden + Timestream Navigator

Mana needed: {4}{U}{U} each turn

UBR identity

Commander legal

The 2 combo pieces

• Grenzo, Dungeon Warden
• Timestream Navigator

What must be in place

You have the city's blessing.
Timestream Navigator does not have summoning sickness.

How to execute it

1. Tap Timestream Navigator to take an extra turn, putting it on the bottom of your library.
2. Activate Grenzo to return Timestream Navigator to the battlefield.
3. Move to your next turn.
4. Repeat for infinite turns.

What the combo produces

• Infinite turns
• Lock