Orvar, the All-Form + Clockspinning + Chromatic Orrery + Mirror Gallery

Orvar, the All-Form

Clockspinning

Chromatic Orrery

Mirror Gallery

How it works

1. Activate Chromatic Orrery's first ability by tapping it, adding 5.
2. Cast Clockspinning with buyback by paying 4, targeting Chromatic Orrery.
3. Orvar's first ability triggers, creating a token copy of Chromatic Orrery.
4. Resolve Clockspinning, returning it to your hand.
5. Repeat.
6. Once you have infinite mana, you may instead activate the Chromatic Orrery tokens using their second abilities, or target any other permanent.

By casting Clockspinning with buyback while targeting Chromatic Orrery, Orvar, the All-Form's triggered ability steps in to create a token copy of that Orrery every single time. Thanks to Mirror Gallery lifting the restriction of the legend rule, you can amass an unbounded army of Chromatic Orrery tokens without fear, multiplying your mana-producing potential exponentially. With the Orrery's ability to let you spend mana as any color, this loop quickly generates infinite colored and colorless mana, which then feeds the buyback cost and lets you endlessly draw your entire deck.