How can you create a combo with Prototype Portal, Gonti's Aether Heart, Thopter Assembly, Krark-Clan Ironworks?
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[START OF COMBO]This combo can be formed with Prototype Portal, Gonti's Aether Heart, Thopter Assembly, Krark-Clan Ironworks

Color identity: C
Mana cost: {6} each turn
Steps:
  1. At the beginning of your upkeep, Thopter Assembly triggers.
  2. Holding priority, activate Prototype Portal by paying {6} and tapping it, creating a token copy of Gonti's Aether Heart.
  3. Gonti's Aether Heart enters the battlefield, causing you to get {E}{E}.
  4. Resolve the Thopter Assembly trigger, returning it from the battlefield to your hand and creating five 1/1 Thopter artifact creature tokens.
  5. The Thopters enter the battlefield, triggering Gonti's Aether Heart five times, causing you to get ten {E}.
  6. Activate Krark-Clan Ironworks five times by sacrificing the five Thopters, adding ten {C}.
  7. Cast Thopter Assembly by paying {6}.
  8. Thopter Assembly enter the battlefield, triggering Gonti's Aether Heart, causing you to get {E}{E}.
  9. Activate Gonti's Aether Heart by paying eight {E} and exiling it, causing you to take an extra turn after this one.
  10. Repeat each turn.[END OF COMBO STEPS]

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

Other prerequisites:
  - Prototype Portal must be on the battlefield
  - Gonti's Aether Heart must be exiled
  - Thopter Assembly must be on the battlefield
  - Krark-Clan Ironworks must be on the battlefield
  - You control no other Thopters.
[END OF COMBO PREREQUISITES]
assistant