Rukarumel, Biologist + Time Sieve + Myr Battlesphere + Lin Sivvi, Defiant Hero

Rukarumel, Biologist

Time Sieve

Myr Battlesphere

Lin Sivvi, Defiant Hero

How it works

1. Activate Lin Sivvi's first ability by paying 7 and tapping it, causing you to search your library for Myr Battlesphere and put it onto the battlefield.
2. When Myr Battlesphere enters the battlefield, it triggers, creating four 1/1 Myr artifact creature tokens.
3. Activate Time Sieve by tapping it, sacrificing Myr Battlesphere and the four Myr tokens, causing you to take an extra turn after this one.
4. Activate Lin Sivvi's second ability by paying 3, putting Myr Battlesphere on the bottom of your library from your graveyard.
5. Repeat each turn.

This engine relies on Rukarumel, Biologist to bridge an unexpected mechanical gap, making non-Rebel artifact creatures into honorary Rebels so that Lin Sivvi, Defiant Hero can tutor them directly out of your library. Once Lin Sivvi fetches Myr Battlesphere, its arrival floods the board with four Myr tokens that conveniently double as sacrifice fodder alongside the Battlesphere itself. Time Sieve devours this exact payload of five artifacts to secure an extra turn, and since Myr Battlesphere hits the graveyard in the process, Lin Sivvi's second ability can quietly tuck it back to the bottom of your library to repeat the whole cycle anew.