Inalla, Archmage Ritualist, Timestream Navigator, and Erratic Portal

Prerequisites

• Inalla, Archmage Ritualist on the battlefield or in the command zone
• Timestream Navigator in hand
• Erratic Portal on the battlefield
• You have the City's Blessing or have at least eight permanents on the battlefield
• available

Steps

1. Cast Timestream Navigator by paying
2. Timestream Navigator enters the battlefield, triggering Inalla; pay to make a token copy of Timestream Navigator with haste
3. Activate the token Timestream Navigator by paying , tapping it, and putting it on the bottom of your library, taking an extra turn after this one
4. Activate Erratic Portal by paying and tapping it, returning the original Timestream Navigator to your hand
5. Repeat each turn

Results

• Infinite turns