How can you create a combo with Merieke Ri Berit, Thornbite Staff?
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[START OF COMBO]This combo can be formed with Merieke Ri Berit, Thornbite Staff

Color identity: WUB
Mana cost: 
Steps:
  1. Activate Merieke Ri Berit's own ability by tapping it, gaining control of target creature as long as you control Merieke Ri Berit and creating a delayed triggered ability.
  2. Untap Merieke Ri Berit by any method.
  3. Merieke Ri Berit's delayed triggered ability triggers, destroying the creature you gained control of.
  4. Merieke Ri Berit's ability from Thornbite Staff triggers.
  5. In response, activate Merieke Ri Berit's own ability by tapping it, gaining control of target creature as long as you control Merieke Ri Berit and creating a delayed triggered ability.
  6. Resolve the ability from step 4, untapping Merieke Ri Berit.
  7. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Destroy any number of creatures
  - Destroy each creature that enters the battlefield under an opponent's control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Merieke Ri Berit does not have summoning sickness.
  - Thornbite Staff attached to Merieke Ri Berit.
  - You have a way to untap Merieke Ri Berit once.
[END OF COMBO PREREQUISITES]
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