How can you create a combo with Malcolm, Keen-Eyed Navigator, Havoc Jester, Amoeboid Changeling?
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[START OF COMBO]This combo can be formed with Malcolm, Keen-Eyed Navigator, Havoc Jester, Amoeboid Changeling

Color identity: UR
Mana cost: 
Steps:
  1. Activate Amoeboid Changeling's first ability by tapping it, causing Havoc Jester to gain all creature types until end of turn.
  2. Activate a Treasure token by tapping and sacrificing it, adding one mana of any color.
  3. Havoc Jester triggers, dealing 1 damage to any opponent.
  4. Malcolm triggers, creating a Treasure token.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite damage[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least one Treasure token.
  - Amoeboid Changeling does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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