How can you create a combo with Breya, Etherium Shaper, Master Transmuter, Phyrexian Altar, Intruder Alarm?
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[START OF COMBO]This combo can be formed with Breya, Etherium Shaper, Master Transmuter, Phyrexian Altar, Intruder Alarm

Color identity: WUBR
Mana cost: {U}
Steps:
  1. Activate Master Transmuter by paying {U}, tapping it and returning Breya from the battlefield to your hand, putting Breya onto the battlefield from your hand.
  2. Breya enters the battlefield, triggering itself and Intruder Alarm.
  3. Resolve the Breya trigger, creating two 1/1 Thopter artifact creature tokens.
  4. The Thopters enter the battlefield, triggering Intruder Alarm twice.
  5. Resolve all Intruder Alarm triggers, untapping all creatures.
  6. Activate Phyrexian Altar by sacrificing a Thopter, adding {U}.
  7. Repeat.
  8. Once you have infinite creature tokens and infinite colored mana, you may activate Breya's ability infinite times.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite creature tokens
  - Infinite damage
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Reduce any number of target creatures' toughness to zero[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Master Transmuter does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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