Mortuary, Warhost's Frenzy, and Hangarback Walker

Prerequisites

• Mortuary on the battlefield
• Warhost's Frenzy in hand
• Hangarback Walker in hand
• available

Steps

1. Cast Warhost's Frenzy with kicker by paying
2. Cast Hangarback Walker by paying
3. Hangarback Walker enters and dies as a state-based action due to having 0 toughness, triggering Mortuary and Warhost's Frenzy
4. Resolve the Mortuary trigger, putting Hangarback Walker from your graveyard onto the top of your library
5. Resolve the Warhost's Frenzy trigger, causing you to draw a card, thus drawing Hangarback Walker from your library
6. Repeat from step 2

Results

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