Danitha, Benalia's Hope, Phyrexian Altar, and Shade's Form

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Phyrexian Altar on the battlefield
• Shade's Form on the battlefield
• Shade's Form attached to Danitha

Steps

1. Activate Phyrexian Altar by sacrificing Danitha, adding one mana of any color
2. When Danitha dies, Shade's Form triggers, returning Danitha from your graveyard to the battlefield tapped
3. When Danitha enters the battlefield, it triggers, returning Shade's Form from your graveyard to the battlefield attached to Danitha
4. Repeat

Results

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