How can you create a combo with Goblin Welder, Thornbite Staff, Perilous Myr?
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[START OF COMBO]This combo can be formed with Goblin Welder, Thornbite Staff, Perilous Myr

Color identity: R
Mana cost: 
Steps:
  1. Tap Goblin Welder, targeting the artifact creature on the battlefield and Perilous Myr in your graveyard.
  2. The artifact creature is sacrificed and Perilous Myr enters the battlefield.
  3. Goblin Welder triggers, untapping itself.
  4. Activate Goblin Welder again, targeting the artifact creature in your graveyard and Perilous Myr on the battlefield.
  5. The artifact creature returns to the battlefield and Perilous Myr is sacrificed.
  6. Goblin Welder triggers, untapping itself.
  7. Perilous Myr triggers, dealing 2 damage to any target.
  8. Repeat for infinite damage.[END OF COMBO STEPS]

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

Other prerequisites:
  - Goblin Welder must be on the battlefield
  - Thornbite Staff must be on the battlefield
  - Perilous Myr must be in the graveyard
  - Thornbite Staff attached to Goblin Welder.
  - You control a nontoken artifact creature.
  - Goblin Welder does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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