How can you create a combo with Grand Architect, Staff of Domination, Karn, Silver Golem?
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[START OF COMBO]This combo can be formed with Grand Architect, Staff of Domination, Karn, Silver Golem

Color identity: U
Mana cost: {1}{U}
Steps:
  1. Activate Karn by paying {1}, causing Staff of Domination to become an artifact creature until end of turn.
  2. Activate Grand Architect's first ability by paying {U}, causing Staff of Domination to become blue until end of turn.
  3. Activate Grand Architect's second ability by tapping Staff of Domination, adding {C}{C} that can only be spent to cast artifact spells or to activate abilities of artifacts.
  4. Activate Staff of Domination's first ability by paying {1}, untapping it.
  5. Repeat from step 3.
  6. Once you have infinite mana, you may instead tap Staff of Domination using its other abilities if it does not have summoning sickness.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite colorless mana that can only be spent to activate abilities of artifacts
  - Infinite colorless mana that can only be spent to cast artifact spells
  - Infinite draw triggers
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite mana creatures you control can produce
  - Infinite untap of creatures you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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