Unstoppable Slasher, The Mycosynth Gardens, Amulet of Vigor, and Shilgengar, Sire of Famine

Prerequisites

• Unstoppable Slasher on the battlefield
• The Mycosynth Gardens on the battlefield
• Amulet of Vigor on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• available

Steps

1. Activate The Mycosynth Gardens' third ability by paying and tapping it, causing it to become a copy of Amulet of Vigor
2. Activate Shilgengar by sacrificing Unstoppable Slasher
3. When Unstoppable Slasher dies, its second ability triggers, returning it from your graveyard to the battlefield with two stun counters on it
4. When Unstoppable Slasher enters, Amulet of Vigor and The Mycosynth Gardens trigger, untapping Unstoppable Slasher twice, which will instead remove both stun counters from Unstoppable Slasher
5. Resolve the Shilgengar ability
6. Repeat from step 2

Results

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