Mortuary + Vivien, Monsters' Advocate + Stonecoil Serpent

Mortuary
Vivien, Monsters' Advocate
Stonecoil Serpent

Requires
Mortuary must be on the battlefield. Vivien, Monsters' Advocate must be on the battlefield. Stonecoil Serpent must be in hand, or in the library.
Steps
  1. Cast Stonecoil Serpent either from your hand or from the top of your library by paying 0.
  2. Stonecoil Serpent enters the battlefield and dies as a state-based action due to having zero toughness.
  3. Mortuary triggers, putting Stonecoil Serpent on top of your library from your graveyard.
  4. Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite storm count.

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