The Tenth Doctor + Inspiring Refrain + Mind Over Matter + Chromatic Orrery

The Tenth Doctor

Inspiring Refrain

Mind Over Matter

Chromatic Orrery

How it works

1. Activate Chromatic Orrery's first ability by tapping it, adding 5.
2. If Inspiring Refrain is in your hand, cast it by paying 6.
3. Otherwise, activate The Tenth Doctor by paying 7, causing you to time travel three times, removing all time counters from Inspiring Refrain and cast Inspiring Refrain from exile without paying its mana cost.
4. Resolve Inspiring Refrain, causing you to draw two cards and exile Inspiring Refrain with three time counters on it.
5. Activate Mind over Matter by discarding a card, untapping Chromatic Orrery.
6. Activate Chromatic Orrery's first ability by tapping it, adding 5.
7. Activate Mind over Matter by discarding a card, untapping Chromatic Orrery.
8. Repeat.

This clever loop relies on Mind Over Matter to continuously untap Chromatic Orrery, whose five-mana tap ability more than pays the card-discard cost while letting you churn through your library. To keep your hand fully stocked for all those discards, Inspiring Refrain steps in to provide a steady stream of card draw whenever you need it, and can even be accelerated from exile using The Tenth Doctor's Timey-Wimey ability. By cycling cards through your graveyard to untap your mana source, you generate near-infinite colored mana, colorless mana, and card draw to overwhelm the table.