Woe Strider, Twilight Shepherd, and Thran Vigil

Prerequisites

• Woe Strider on the battlefield
• Twilight Shepherd on the battlefield
• Thran Vigil on the battlefield

Steps

1. Activate Woe Strider by sacrificing Twilight Shepherd
2. When Twilight Shepherd dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Thran Vigil triggers, putting a +1/+1 counter on Twilight Shepherd
4. Resolve the Woe Strider ability
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite scry 1