How can you create a combo with Deathrender, Myr Retriever, Scrap Trawler, Grinding Station?
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[START OF COMBO]This combo can be formed with Deathrender, Myr Retriever, Scrap Trawler, Grinding Station

Color identity: C
Mana cost: 
Steps:
  1. Activate Grinding Station by tapping it and sacrificing Myr Retriever.
  2. Myr Retriever dies, triggering itself and Deathrender.
  3. Resolve the Myr Retriever trigger, returning Scrap Trawler from your graveyard to your hand.
  4. Resolve the Deathrender trigger, putting Scrap Trawler from your hand onto the battlefield, and attaching Deathrender to it.
  5. Scrap Trawler enters the battlefield, triggering Grinding Station, untapping Grinding Station.
  6. Resolve the Grinding Station ability from step 1, causing target player to mill three cards.
  7. Activate Grinding Station by tapping it and sacrificing Scrap Trawler.
  8. Scrap Trawler dies, triggering itself and Deathrender.
  9. Resolve the Scrap Trawler trigger, returning Myr Retriever from your graveyard to your hand.
  10. Resolve the Deathrender trigger, putting Myr Retriever from your hand onto the battlefield, and attaching Deathrender to it.
  11. Myr Retriever enters the battlefield, triggering Grinding Station, untapping Grinding Station.
  12. Resolve the Grinding Station ability from step 7, causing target player to mill three cards.
  13. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - Deathrender must be on the battlefield
  - Myr Retriever must be on the battlefield
  - Scrap Trawler must be in the graveyard
  - Grinding Station must be on the battlefield
  - Deathrender attached to Myr Retriever.
[END OF COMBO PREREQUISITES]
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