Ulamog's Dreadsire, Thornbite Staff, and Woe Strider

Prerequisites

• Ulamog's Dreadsire on the battlefield
• Thornbite Staff on the battlefield
• Woe Strider on the battlefield
• Thornbite Staff attached to Ulamog's Dreadsire
• Ulamog's Dreadsire does not have summoning sickness

Steps

1. Activate Ulamog's Dreadsire by tapping it, creating a 10/10 Eldrazi creature tokens
2. Activate Woe Strider by sacrificing the Eldrazi token
3. When the Eldrazi token dies, Ulamog's Dreadsire triggers, untapping Ulamog's Dreadsire
4. Resolve the Woe Strider ability, causing you to scry 1
5. Repeat

Results

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