Solar Array, Magistrate's Scepter, and Drafna, Founder of Lat-Nam

Prerequisites

• Solar Array on the battlefield
• Magistrate's Scepter in hand
• Drafna, Founder of Lat-Nam on the battlefield
• plus in two different colors each turn available

Steps

1. Activate Solar Array by tapping it, adding one mana of any color and causing the next artifact spell you cast to have sunburst
2. Cast Magistrate's Scepter by paying using three different colors of mana
3. Magistrate's Scepter's sunburst ability triggers, causing it to enter with three charge counters on it
4. 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
5. Activate Drafna by paying , returning Magistrate's Scepter from the battlefield to your hand
6. Repeat each turn

Results

• Infinite turns