Inalla, Archmage Ritualist + Timestream Navigator + Erratic Portal

Prerequisites

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

Steps

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

Effects

• Infinite turns
• Lock