Giada, Font of Hope, Twilight Shepherd, and Ashnod's Altar

Prerequisites

• Giada, Font of Hope on the battlefield
• Twilight Shepherd on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Twilight Shepherd, adding
2. Twilight Shepherd's persist ability triggers, returning it to the battlefield with that many +1/+1 counter on it for each Angel you already control
3. Repeat

Results

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