Gravecrawler, Rooftop Storm, and Phyrexian Ghoul

Prerequisites

• Gravecrawler on the battlefield
• Rooftop Storm on the battlefield
• Phyrexian Ghoul on the battlefield

Steps

1. Activate Phyrexian Ghoul's ability by sacrificing Gravecrawler, giving Phyrexian Ghoul +2/+2 until end of turn
2. Cast Gravecrawler from your graveyard by paying
3. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely large Phyrexian Ghoul until end of turn
• Infinite sacrifice triggers
• Infinite storm count