Yarok, the Desecrated + Time Sieve + Myr Battlesphere + Conjurer's Closet

Yarok, the Desecrated

Time Sieve

Myr Battlesphere

Conjurer's Closet

How it works

1. At the beginning of your end step, Conjurer's Closet triggers, blinking Myr Battlesphere.
2. When Myr Battlesphere enters the battlefield, its first ability triggers twice, creating eight 1/1 Myr artifact creature tokens.
3. Activate Time Sieve by tapping it and sacrificing five Myrs, causing you to take an extra turn after this one.
4. Repeat each turn.

This loop sets up an unstoppable engine centered around the incredible token generation of Myr Battlesphere. When Conjurer's Closet exiles and returns the Battlesphere at your end step, Yarok, the Desecrated steps in to double that entry trigger, flooding your board with eight Myr artifact creature tokens in a single sweep. With that sudden influx of metal, you easily satisfy the steep sacrifice cost of Time Sieve, trading five of those newly minted tokens to take an extra turn after this one. By repeating this process on each subsequent turn, you lock down the game with an infinite sequence of turns fueled entirely by the multiplied might of your artifacts.