Moxite Refinery + Magistrate's Scepter + Mossborn Hydra + Oboro, Palace in the Clouds

Moxite Refinery

Magistrate's Scepter

Mossborn Hydra

Oboro, Palace in the Clouds

How it works

1. Play Oboro, Palace in the Clouds.
2. When it enters, Mossborn Hydra triggers, doubling the number of +1/+1 counters on it.
3. 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.
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. Activate Oboro's first ability by tapping it, adding .
6. Activate Oboro's last ability by paying 1, returning it from the battlefield to your hand.
7. Repeat each turn.