How can you create a combo with Prosper, Tome-Bound, Portcullis, Eternal Scourge, Planar Gate?
user
[START OF COMBO]This combo can be formed with Prosper, Tome-Bound, Portcullis, Eternal Scourge, Planar Gate

Color identity: BR
Mana cost: {1} plus an additional {1} available if Eternal Scourge is in hand
Steps:
  1. Cast Eternal Scourge either from your hand or from exile by paying {1}.
  2. If you played Eternal Scourge from exile, Prosper's second ability triggers, creating a Treasure token.
  3. Eternal Scourge enters the battlefield, triggering Portcullis, exiling Eternal Scourge.
  4. If you created a Treasure token, activate it by tapping and sacrificing it, adding {1}.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Prosper, Tome-Bound must be on the battlefield
  - Portcullis must be on the battlefield
  - Eternal Scourge must be in your hand or exiled
  - Planar Gate must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant