Samwise Gamgee, Witch's Oven, Shield Sphere, and Clock of Omens

Prerequisites

• Samwise Gamgee on the battlefield
• Witch's Oven on the battlefield
• Shield Sphere in hand
• Clock of Omens on the battlefield

Steps

1. Cast Shield Sphere by paying
2. When Shield Sphere enters the battlefield, Samwise triggers, creating a Food artifact token
3. If desired, you may activate Clock of Omens by tapping the Food and Shield Sphere, untapping any artifact
4. Activate Witch's Oven by tapping it and sacrificing Shield Sphere, creating two Food artifact tokens
5. Activate Clock of Omens by tapping two Foods, untapping Witch's Oven
6. Activate Samwise by sacrificing three Foods, returning Shield Sphere from your graveyard to your hand
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana artifacts you control can produce
• Infinite sacrifice triggers
• Infinite storm count
• Infinite untap of artifacts you control