Inspirit, Flagship Vessel + Magistrate's Scepter + Bloodthirster

Inspirit, Flagship Vessel

Magistrate's Scepter

Bloodthirster

How it works

1. At the beginning of your combat phase, Inspirit triggers, putting two charge counters on Magistrate's Scepter.
2. Deal combat damage to an opponent using Bloodthirster, triggering its ability, causing you to untap it and to get an additional combat phase after this one.
3. Move to your second combat phase. At the beginning of the combat phase, Inspirit triggers, putting two charge counters on Magistrate's Scepter.
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. Repeat each turn.

This clever engine pairs the multi-combat fury of Bloodthirster with the steady resource generation of Inspirit, Flagship Vessel. While Bloodthirster keeps granting you fresh combat phases by untapping and swinging at separate players, Inspirit triggers at the beginning of each of those combats to steadily stack charge counters onto Magistrate's Scepter. Once the scepter accumulates enough counters from these accelerated steps, you can cash them in to take infinite extra turns, locking down the game completely.