Yore-Tiller Nephilim, Port Razer, and Goblin Bombardment

Prerequisites

• Yore-Tiller Nephilim on the battlefield
• Port Razer in the graveyard
• Goblin Bombardment on the battlefield
• Yore-Tiller Nephilim does not have summoning sickness
• An opponent is unable to block creatures you control

Steps

1. Declare Yore-Tiller Nephilim as an attacker
2. Yore-Tiller Nephilim triggers, returning Port Razer from your graveyard onto the battlefield tapped and attacking
3. Deal combat damage with Port Razer and Yore-Tiller Nephilim
4. Port Razer triggers, untapping each creature you control and causing you to get an additional combat phase after this one
5. Activate Goblin Bombardment by sacrificing Port Razer, dealing 1 damage to any target
6. Repeat each combat phase

Results

• Infinite combat phases
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures you control