Entomb + Isochron Scepter + Muldrotha, the Gravetide + Timestream Navigator

Mana needed: {5}{U}{U}{U} each turn

BGU identity

Commander legal

The 4 combo pieces

• Entomb
• Isochron Scepter
• Muldrotha, the Gravetide
• Timestream Navigator

What must be in place

Timesteam Navigator does not have summoning sickness.
You have not cast a creature spell using Muldrotha this turn.
You have the city's blessing.

How to execute it

1. Activate Timestream Navigator by paying {2}{U}{U}, tapping it and putting it from the battlefield onto the bottom of your library, causing you to take an extra turn after this one.
2. Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Entomb without paying its mana cost.
3. Resolve Entomb, searching your library for Timestream Navigator and putting it into your graveyard.
4. Cast Timestream Navigator from your graveyard by paying {1}{U}.
5. Repeat each turn.

What the combo produces

• Infinite turns
• Lock