Magistrate's Scepter + Contagion Engine + Lithoform Engine

Prerequisites

• Magistate's Scepter has at least one charge counter on it.

Steps

1. 1Activate Contagion Engine by paying and tapping it.
2. 2Holding priority, activate Lithoform Engine's first ability by paying and tapping it, copying Contagion Engine's ability.
3. 3Resolve both Contagion Engine abilities, putting four charge counters on Magistrate's Scepter.
4. 4Activate 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. 5Repeat each turn.

Effects

• Infinite turns
• Lock