How can you create a combo with Amoeboid Changeling, Spirit Mirror, Thornbite Staff?
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[START OF COMBO]This combo can be formed with Amoeboid Changeling, Spirit Mirror, Thornbite Staff

Color identity: WU
Mana cost: 
Steps:
  1. Activate Amoeboid Changeling's first ability by tapping it, causing any creature an opponent controls to gain all creature types until end of turn.
  2. Activate Spirit Mirror by paying {0}, destroying the opponent's creature.
  3. The creature dies, triggering Amoeboid Changeling, untapping Amoeboid Changeling.
  4. Repeat.
  5. You may also repeat this loop whenever a creature enters the battlefield under an opponent's control.[END OF COMBO STEPS]

Result:
  - Destroy all creatures opponents control
  - Destroy all creatures that enter the battlefield under an opponent's control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Thornbite Staff attached to Amoeboid Changeling.
  - Amoeboid Changeling does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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