Chandra, Hope's Beacon + Temporal Manipulation + Call to Mind + Mystic Retrieval

Chandra, Hope's Beacon
Temporal Manipulation
Call to Mind
Mystic Retrieval

Requires
Mystic Retrieval in your graveyard. Call to Mind in hand. Chandra on the battlefield. Temporal Manipulation in hand. You have not cast an instant or sorcery this turn. 3uu available on each odd-numbered turn, with at most 3u available each even-numbered turn.
Steps
  1. Cast Temporal Manipulation by paying 3uu
  2. Chandra triggers, copying Temporal Manipulation
  3. Resolve both Temporal Manipulations, causing you to take two extra turns after this one
  4. Move to your next turn
  5. Cast etiher Mystic Retrieval or Call to Mind by paying its mana cost, targeting either Call to Mind or Mystic Retrieval in your graveyard
  6. Chandra triggers, copying Call to Mind or Mystic Retrieval, targeting Temporal Manipulation
  7. Resolve both Call to Minds or Mystic Retrievals, returning Temporal Manipulation and either Call to Mind or Mystic Retrieval from your graveyard to your hand
  8. Move to your next turn
  9. Repeat
Results
Infinite turns.