Mortuary, Grim Haruspex, and Endless One

Prerequisites

• Mortuary on the battlefield
• Grim Haruspex on the battlefield
• Endless One in hand

Steps

1. Cast Endless One by paying
2. Endless One enters and dies as a state-based action due to having 0 toughness, triggering Mortuary and Grim Haruspex
3. Resolve the Mortuary trigger, putting Endless One from your graveyard onto the top of your library
4. Resolve the Grim Haruspex trigger, causing you to draw a card, thus drawing Endless One from your library
5. Repeat

Results

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