Mikaeus, the Unhallowed, Shilgengar, Sire of Famine, and Chaos Spewer

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• Chaos Spewer on the battlefield

Steps

1. Activate Shilgengar by sacrificing Chaos Spewer
2. When Chaos Spewer dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
3. When Chaos Spewer enters the battlefield, it triggers, putting a -1/-1 counter on it
4. Resolve the Shilgengar ability Repeat

Results

• Infinite Blood tokens
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers