Eternity Vessel + Magistrate's Scepter + Donatello, Mutant Mechanic

Prerequisites

• You have a way to put an artifact into your graveyard from the battlefield.

Steps

1. 1Cast Eternity Vessel by paying . It will enter with a number of charge counters on it equal to your life total.
2. 2Cause Eternity Vessel to leave the battlefield. When it does, Donatello triggers, putting a number of charge counters on Magistrate's Scepter equal to the number Eternity Vessel had on it.
3. 3Activate 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. 4Repeat step 3 as able each turn.

Effects

• Lock
• Near-infinite turns