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

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, creating two 1/1 Thopter artifact creature tokens.
  3. Activate Clock of Omens by tapping the Thopters, untapping Master Transmuter.
  4. Activate Phyrexian Altar by sacrificing a Thopter, adding {U}.
  5. Repeat.
  6. 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 damage
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite tapped creature tokens
  - 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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