the front side of Goblin Welder
the back of a classic MtG card
the front side of Sewer-veillance Cam
the back of a classic MtG card

Color Identity: U, R

Initial Card State

  1.  Goblin Welder and Sewer-veillance Cam on the battlefield (Goblin Welder without summoning sickness).

Easy Prerequisites

  1. There is an artifact card in your graveyard.

Steps

  1. Activate Goblin Welder by tapping it, causing you to sacrifice Sewer-veillance Cam and return another artifact from your graveyard to the battlefield.
  2. Sewer-veillance Cam triggers, untapping Goblin Welder.
  3. Activate Goblin Welder by tapping it, causing you to sacrifice the artifact returned in step 1 and return Sewer-veillance Cam from your graveyard to the battlefield.
  4. When Sewer-veillance Cam enters, it triggers, untapping Goblin Welder.
  5. Repeat.

Notes

  1. You can get infinite creature ETB, LTB, death and sacrifice trigger results if the other artifact is an artifact creature.

Results

  1. Infinite ETB.
  2. Infinite LTB.
  3. Infinite death triggers.
  4. Infinite recursion of artifact creatures you control.
  5. Infinite sacrifice triggers.
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