Azusa, Lost but Seeking + Magistrate's Scepter + Evolution Sage + Guildless Commons

Azusa, Lost but Seeking

Magistrate's Scepter

Evolution Sage

Guildless Commons

How it works

1. Play Guildless Commons.
2. When Guildless Commons enters the battlefield, it and Evolution Sage trigger.
3. Resolve the Guildless Commons trigger, returning it from the battlefield to your hand.
4. Resolve the Evolution Sage trigger, putting a charge counter on Magistrate's Scepter.
5. Repeat from step 1 until Magistrate's Scepter has four or more charge counters on it.
6. Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, causing you to take an extra turn after this one.
7. Repeat each turn.