Stalwart Successor, Shilgengar, Sire of Famine, and Persistent Constrictor

Prerequisites

• Stalwart Successor on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• Persistent Constrictor on the battlefield

Steps

1. Activate Shilgengar by sacrificing Persistent Constrictor When Persistent Constrictor dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
2. When Persistent Constrictor enters, Stalwart Successor triggers, putting a +1/+1 counter on Persistent Constrictor Resolve the Shilgengar ability
3. Repeat

Results

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