How can you create a combo with Aggravated Assault, Bear Umbra, Pako, Arcane Retriever?
user
[START OF COMBO]This combo can be formed with Aggravated Assault, Bear Umbra, Pako, Arcane Retriever

Color identity: RG
Mana cost: 
Steps:
  1. Declare Pako as attacker.
  2. Pako and Bear Umbra triggers.
  3. Resolve the Pako triggers, exiling the top card of each player's library and putting a fetch counter on each of them, putting a +1/+1 counter on Pako for each noncreature card exiled this way.
  4. Resolve the Bear Umbra triggers, untapping all lands you control.
  5. Proceed to your next main phase.
  6. Activate Aggravated Assault by paying {3}{R}{R}, untapping all creatures you control and getting an additional combat and main phase after this one.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite combat phases
  - Infinitely large Pako[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Bear Umbra attached to Pako.
  - You control lands that can tap to produce at least {3}{R}{R}.
  - An opponent is unable to block and kill creatures you control.
[END OF COMBO PREREQUISITES]
assistant