How can you create a combo with Dual Casting, Intruder Alarm, Sedgemoor Witch?
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[START OF COMBO]This combo can be formed with Dual Casting, Intruder Alarm, Sedgemoor Witch

Color identity: UBR
Mana cost: 
Steps:
  1. Cast any instant or sorcery by paying its mana cost.
  2. Sedgemoor Witch triggers, creating a 1/1 Pest creature token.
  3. The Pest enters the battlefield, triggering Intruder Alarm, untapping all creatures.
  4. Activate all mana-producing creatures you control by tapping them, adding at least {R}.
  5. Activate the creature with Dual Casting attached by paying {R} and tapping it, copying the instant or sorcery spell you cast.
  6. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite copies of any instants and/or sorceries you cast
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinite magecraft triggers
  - Infinite mana creatures you control can produce
  - Infinite untap of all creatures[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Dual Casting attached to a creature without summoning sickness.
  - You have an instant or sorcery card in hand with enough mana to cast it.
  - Creatures you control can tap to produce at least {R}.
[END OF COMBO PREREQUISITES]
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