Time Sieve + Encroaching Mycosynth + Helm of the Host + Izoni, Thousand-Eyed

Prerequisites

• Helm of the Host attached to Izoni.
• You have at least four creature cards in your graveyard.

Steps

1. 1At the beginning of your combat phase, Helm of the Host triggers, creating a nonlegendary token copy of Izoni with haste.
2. 2When the Izoni token enters the battlefield, it triggers, creating a number of 1/1 Insect creature tokens equal to the number of creature cards in your graveyard.
3. 3Activate Time Sieve by tapping it and sacrificing five creature tokens, causing you to take an extra turn after this one.
4. 4Repeat each turn.

Effects

• Infinite turns
• Lock