Mortuary, Amareth, the Lustrous, and Stonecoil Serpent

Prerequisites

• Mortuary on the battlefield
• Amareth, the Lustrous on the battlefield
• Stonecoil Serpent in hand

Steps

1. Cast Stonecoil Serpent by paying
2. Stonecoil Serpent enters the battlefield and dies as a state-based action due to having zero toughness
3. Mortuary and Amareth trigger
4. Resolve the Mortuary trigger, putting Stonecoil Serpent on top of your library from your graveyard
5. Resolve the Amareth trigger, causing you to reveal Stonecoil Serpent from the top of your library and put it into your hand
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite storm count