Giada, Font of Hope, Twilight Shepherd, and Altar of Dementia

Prerequisites

• Giada, Font of Hope on the battlefield
• Twilight Shepherd on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Twilight Shepherd 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
2. Resolve the Altar of Dementia's ability, causing target player to mill cards equal to sacrificed creature's power
3. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers