Saffi Eriksdotter, Samwise the Stouthearted, Phyrexian Altar, and Pitiless Plunderer

Prerequisites

• Saffi Eriksdotter on the battlefield
• Samwise the Stouthearted on the battlefield
• Phyrexian Altar on the battlefield
• Pitiless Plunderer on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting Samwise
2. Saffi dies, triggering Pitiless Plunderer, creating a Treasure token
3. Resolve the Saffi ability
4. Activate Phyrexian Altar by sacrificing Samwise, adding
5. When Samwise dies, Saffi and Pitiless Plunderer trigger
6. Resolve the Pitiless Plunderer trigger, creating a Treasure token
7. Resolve the Saffi trigger, returning Samwise from your graveyard to the battlefield
8. When Samwise enters the battlefield, it triggers, returning Saffi from your graveyard to your hand
9. Activate a Treasure by tapping and sacrificing it, adding
10. Cast Saffi by paying
11. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count
• Infinite Treasure tokens