Prerequisites
- All permanents on the battlefield
- You control another Zombie
Steps
- Activate Phyrexian Altar by sacrificing Gravecrawler, adding
- Cast Gravecrawler from your graveyard by paying
- Gravecrawler enters the battlefield, triggering Necroduality, creating a copy of Gravecrawler
- Repeat
Results
- Infinite creature tokens
- Infinite colored mana
- Infinite ETB
- Infinite LTB
- Infinite death triggers
- Infinite sacrifice triggers
- Infinite storm count
Required Cards 3
Gravecrawler
Creature — Zombie