How can you create a combo with Cast Through Time, Venser, Shaper Savant, Erratic Portal, Nexus of Fate?
user
[START OF COMBO]This combo can be formed with Cast Through Time, Venser, Shaper Savant, Erratic Portal, Nexus of Fate

Color identity: U
Mana cost: 
Steps:
  1. Cast Nexus of Fate by paying {5}{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. In response, activate Erratic Portal by tapping it and paying {1}, 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.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Cast Through Time must be on the battlefield
  - Venser, Shaper Savant must be on the battlefield
  - Erratic Portal must be on the battlefield
  - Nexus of Fate must be in your hand
  - {8}{U}{U}{U}{U} available each turn.
[END OF COMBO PREREQUISITES]
assistant