Stalwart Successor, Altar of Dementia, and Kithkin Spellduster

Prerequisites

• Stalwart Successor on the battlefield
• Altar of Dementia on the battlefield
• Kithkin Spellduster on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Kithkin Spellduster When Kithkin Spellduster dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
2. When Kithkin Spellduster enters, Stalwart Successor triggers, putting a +1/+1 counter on Kithkin Spellduster Resolve the Altar of Dementia ability
3. Repeat

Results

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