Vadrik, Astral Archmage + Mystic Retrieval + Runic Repetition + Turnabout

Vadrik, Astral Archmage

Mystic Retrieval

Runic Repetition

Turnabout

How it works

1. Activate all mana-producing lands you control by tapping them, adding at least .
2. Cast Turnabout by paying , untapping all lands you control.
3. Cast Mystic Retrieval by paying , returning Turnabout from your graveyard to your hand.
4. Cast Mystic Retrieval from your graveyard for its flashback cost by paying , returning Runic Repetition from your graveyard to your hand and exiling Mystic Retrieval.
5. Cast Runic Repetition by paying , returning Mystic Retrieval from exile to your hand.
6. Repeat.
7. If lands you control can tap to produce at least 1, this combo nets infinite mana.