How can you create a combo with Jan Jansen, Chaos Crafter, Pitiless Plunderer, Krark-Clan Ironworks, Umbral Mantle?
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[START OF COMBO]This combo can be formed with Jan Jansen, Chaos Crafter, Pitiless Plunderer, Krark-Clan Ironworks, Umbral Mantle

Color identity: RWB
Mana cost: 
Steps:
  1. Activate Jan Jansen's second ability by tapping it and sacrificing any other noncreature artifact, creating two 1/1 Construct creature tokens.
  2. Activate Krark-Clan Ironworks twice by sacrificing both Construct tokens, adding {C}{C}{C}{C}.
  3. The Constructs die, triggering Pitiless Plunderer twice, creating two Treasure tokens.
  4. Activate Jan Jansen by paying {3} and untapping it, giving itself +2/+2 until end of turn.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite colorless mana
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinitely large Jan Jansen until end of turn
  - Infinite sacrifice triggers
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Umbral Mantle attached to Jan Jansen.
  - You control at least one additional noncreature artifact.
[END OF COMBO PREREQUISITES]
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