Mikaeus, the Unhallowed, Bloodied Ghost, and Shilgengar, Sire of Famine

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Bloodied Ghost on the battlefield
• Shilgengar, Sire of Famine on the battlefield

Steps

1. Activate Shilgengar by sacrifiicing Bloodied Ghost
2. When Bloodied Ghost dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
3. When it enters, Bloodied Ghost will put a -1/-1 counter on itself, removing the +1/+1 counter
4. Resolve the Shilgengar ability
5. Repeat

Results

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