Saffi Eriksdotter, Gerrard, Weatherlight Hero, and Phyrexian Altar

Prerequisites

• Saffi Eriksdotter on the battlefield
• Gerrard, Weatherlight Hero on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Saffi Erikdotter by sacrificing itself, making it so the next time Gerrard dies this turn it will be returned to the battlefield
2. Activate Phyrexian Altar by sacrificing Gerrard, adding one mana of any color
3. Saffi Eriksdotter and Gerrard triggers
4. Resolve the Saffi Eriksdotter trigger, returning Gerrard to the battlefield
5. Resolve the Gerrard trigger, returning all artifact and creature cards that were put into your graveyard this turn from your graveyard onto the battlefield
6. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers