Ravos, Soultender + Time Sieve + Myr Battlesphere

Ravos, Soultender

Time Sieve

Myr Battlesphere

How it works

1. At the beginning of your upkeep, Ravos triggers, returning Myr Battlesphere from your graveyard to your hand.
2. Cast Myr Battlesphere by paying 7.
3. When Myr Battlesphere enters the battlefield, it triggers, creating four 1/1 Myr artifact creature tokens.
4. Activate Time Sieve by tapping it, sacrificing Myr Battlesphere and sacrificing the four Myr tokens, causing you to take an extra turn after this one.
5. Repeat each turn.