Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Woe Strider, and Vengeful Vampire

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Woe Strider on the battlefield
• Vengeful Vampire on the battlefield

Steps

1. Activate Woe Strider by sacrificing Vengeful Vampire When Vengeful Vampire dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
2. Activate Woe Strider by sacrificing Vengeful Vampire When Vengeful Vampire dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Resolve both Woe Strider abilities from step 1 and 3
4. Repeat

Results

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