Chronosavant + Ashnod's Altar + Chromatic Orrery

Chronosavant

Ashnod's Altar

Chromatic Orrery

How it works

1. Activate Ashnod's Altar by sacrificng Chronosavant, adding 2.
2. Activate Chronosavant by paying 2, returning it to the battlefield from your graveyard and causing you to skip your next turn.
3. Repeat.

This curious loop lets you bend the flow of time to your will by using Ashnod's Altar to harvest Chronosavant for two colorless mana each cycle. You can then immediately reinvest that mana into Chronosavant's own self-resurrection ability, looping the two cards endlessly while skipping all of your upcoming turns in the process. While Chromatic Orrery doesn't even need to be tapped to help here, its passive ability ensures that any mana requirements you might encounter can always be paid without a hitch.