Time Sieve + Myr Battlesphere + Teleportation Circle + Tezzeret the Schemer

Time Sieve

Myr Battlesphere

Teleportation Circle

Tezzeret the Schemer

How it works

1. Activate Tezzeret's first loyalty ability by putting a loyalty counter on it, creating an Etherium Cell artifact token.
2. At the beginning of your end step, Teleportation Circle triggers, blinking Myr Battlesphere.
3. When Myr Battlesphere enters the battlefield, its first ability triggers, creating four 1/1 Myr artifact creature tokens.
4. Activate Time Sieve by tapping it and sacrificing the Myrs and Etherium Cell, causing you to take an extra turn after this one.
5. Repeat each turn.

This ingenious loop bends time to your will by combining token generation and recurring end-step manipulation into an endless sequence of extra turns. The engine is fueled by Teleportation Circle, which quietly blinks Myr Battlesphere at the start of every end step to constantly replenish your board with fresh Myr artifact creature tokens. Meanwhile, Tezzeret the Schemer steadily contributes Etherium Cell tokens to help meet the artifact threshold, laying the foundation for your ultimate sacrifice. Once you have enough pieces, you simply cash in your tokens via Time Sieve, taking an extra turn to untap and do it all over again.