Prerequisites
- All permanents on the battlefield
- You control an additional Zombie
Steps
- Activate Phyrexian Altar by sacrificing Gravecrawler, adding
- Cast Gravecrawler from your graveyard for
- Ominous Roost triggers, creating a 1/1 Bird creature token
- 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