Magistrate's Scepter + Moxite Refinery

Mana needed: {2} each turn

C identity

Commander legal

The 2 combo pieces

Activate a Spacecraft's station ability by tapping a creature you control, putting a number of charge counters on the Spacecraft equal to the creature's power.
If necessary, repeat step 1 until the Spacecraft has three or more charge counters on it.
Activate Moxite Refinery by paying {2}, tapping it and removing three charge counters from the Spacecraft, putting three charge counters on Magistrate's Scepter.
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.
Repeat each turn.