Cast Through Time + Crystal Shard + Venser, Shaper Savant + Walk the Aeons

U identity

Commander legal

The 4 combo pieces

What must be in place

{6}{U}{U}{U}{U} available each turn.
An additional {3} or {U} available to activate Crystal Shard.

How to execute it

  1. Cast Walk the Aeons by paying {4}{U}{U}, granting you an extra turn after this one and exiling it due to rebound.
  2. At the beginning of your next upkeep, rebound triggers, causing you to cast the exiled spell without paying its mana cost.
  3. Activate Crystal Shard by tapping it and paying {3} or {U}, returning Venser to your hand.
  4. Cast Venser by paying {2}{U}{U}.
  5. When Venser enters the battlefield, they trigger, returning the extra turn spell to your hand.
  6. Repeat each turn.

What the combo produces