Bloodshot Cyclops, Adarkar Valkyrie, and Village Bell-Ringer

Prerequisites

• Bloodshot Cyclops on the battlefield
• Adarkar Valkyrie on the battlefield
• Village Bell-Ringer on the battlefield
• Bloodshot Cyclops and Adarkar Valkyrie do not have summoning sickness

Steps

1. Activate Adarkar Valkyrie by tapping it, targeting Village Bell-Ringer
2. Activate Bloodshot Cyclops by tapping it and sacrificing Village Bell-Ringer
3. When Village Bell-Ringer dies, Adarkar Valkyrie triggers, returning Village Bell-Ringer to the battlefield from your graveyard
4. When Village Bell-Ringer enters the battlefield, it triggers, untapping all creatures you control
5. Resolve the Bloodshot Cyclops ability from step 3, dealing damage equal to Village Bell-Ringer's power to any target
6. Repeat

Results

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