How can you create a combo with Sphinx of the Second Sun, Aggravated Assault?
user
[START OF COMBO]This combo can be formed with Sphinx of the Second Sun, Aggravated Assault

Color identity: UR
Mana cost: 
Steps:
  1. Move to your postcombat main phase.
  2. Sphinx of the Second Sun triggers, causing you to get an additional beginning phase after this phase.
  3. Activate all lands you control by tapping them, adding at least {6}{R}{R}{R}{R}.
  4. Activate Aggravated Assault by paying {3}{R}{R}, causing you to untap all creatures you control and to get an additional combat and main phase after this one.
  5. Repeat step 4 one additonal time.
  6. Move to the main phase from step 5.
  7. At the beginning of the main phase, Sphinx of the Second Sun triggers, causing you to get an additional beginning phase after this phase.
  8. Move to the beginning phase from step 7, causing you to untap all lands you control and draw a card.
  9. Move to the main phase from step 4.
  10. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite draw triggers
  - Near-infinite combat phases
  - Near-infinite untap of creatures and lands you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Lands you control can tap to produce at least {6}{R}{R}{R}{R}.
[END OF COMBO PREREQUISITES]
assistant