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.

Infinite turns

Spacecraft

Moxite Refinery

Magistrate's Scepter

Play Simic Growth Chamber. When it enters, it and Mossborn Hydra trigger.
Resolve the Simic Growth Chamber trigger, returning it from the battlefield to your hand.
Resolve the Mossborn Hydra trigger, doubling the number of +1/+1 counters on it.
Activate Moxite Refinery by paying {2}, tapping it and removing three +1/+1 counters from Mossborn Hydra, 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.

Combos with "Moxite Refinery"