Danitha, Benalia's Hope, Phyrexian Altar, and Gift of Immortality

Prerequisites

• Danitha, Benalia's Hope on the battlefield
• Phyrexian Altar on the battlefield
• Gift of Immortality on the battlefield
• Gift of Immortality attached to Danitha

Steps

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

Results

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