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

Color identity: WUB
Mana cost: 
Steps:
  1. Activate Cauldron of Souls by tapping it, giving Arsenal Thresher persist until end of turn.
  2. Activate Grinding Station by tapping it and sacrificing Arsenal Thresher.
  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. When Arsenal Thresher enters the battlefield, Grinding Station triggers, untapping Grinding Station.
  7. Resolve the Grinding Station ability from step 2, causing target player to mill three cards.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite sacrifice triggers
  - Infinite death triggers
  - Infinite mill
  - Infinite self-mill[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]
assistant