How can you create a combo with Cauldron of Souls, Dross Scorpion, Arsenal Thresher, Thermopod?
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[START OF COMBO]This combo can be formed with Cauldron of Souls, Dross Scorpion, Arsenal Thresher, Thermopod

Color identity: WUBR
Mana cost: 
Steps:
  1. Activate Cauldron of Souls by tapping it, giving Arsenal Thresher persist until end of turn.
  2. Activate Thermopod's second ability by sacrificing Arsenal Thresher, adding {R}.
  3. When Arsenal Thresher dies, its persist ability and Dross Scorpion trigger.
  4. Resolve the Dross Scorpion trigger, untapping Cauldron of Souls.
  5. Resolve the Arsenal Thresher trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it, and then choosing to reveal at least one artifact card from your hand to remove the -1/-1 counter.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite sacrifice triggers
  - Infinite death triggers
  - Infinite red mana[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have at least one artifact card in hand.
  - Arsenal Thresher does not have a -1/-1 counter on it.
[END OF COMBO PREREQUISITES]
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