Magistrate's Scepter + Vedalken Infuser + Doppelgang

Magistrate's Scepter

Vedalken Infuser

Doppelgang

How it works

1. Cast Doppelgang by paying 6, creating two token copies of Vedalken Infuser.
2. At the beginning of your next upkeep, each Vedalken Infuser triggers, putting three charge counters on Magistrate's Scepter.
3. 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.
4. Repeat from step 2 each turn.