Isochron Scepter + Karn's Temporal Sundering + Reprieve + The Sixth Doctor

Mana needed: {6}{U}{U} each turn

GWU identity

Commander legal

The 4 combo pieces

How to execute it

  1. Cast Karn's Temporal Sundering by paying {4}{U}{U}.
  2. The Sixth Doctor triggers, copying Karn's Temporal Sundering.
  3. Resolve the copy of Karn's Temporal Sundering, causing you to take an extra turn after this one.
  4. Holding priority, activate Isochron Scepter by paying {2} and tapping it, casting a copy of Reprieve without paying its mana cost.
  5. Resolve Reprieve, returning the original Karn's Temporal Sundering to your hand and causing you to draw a card.
  6. Repeat each turn.

What the combo produces