Woe Strider, Heartmender, and Thran Vigil

Prerequisites

• Woe Strider on the battlefield
• Heartmender on the battlefield
• Thran Vigil on the battlefield

Steps

1. Activate Woe Strider by sacrificing Heartmender
2. When Heartmender 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 Heartmender
4. Resolve the Woe Strider ability
5. Repeat

Results

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