Encroaching Mycosynth, Efficient Construction, Phyrexian Altar, and Shrieking Drake

Prerequisites

• Encroaching Mycosynth on the battlefield
• Efficient Construction on the battlefield
• Phyrexian Altar on the battlefield
• Shrieking Drake in hand
• available

Steps

1. Cast Shrieking Drake by paying
2. Efficient Construction triggers, creating a 1/1 Thopter artifact creature token
3. Activate Phyrexian Altar by sacrificing a Thopter, adding
4. Shrieking Drake enters the battlefield, returning itself to its owner's hand
5. Repeat

Results

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