Altar of Dementia, Thunderblust, and Hardened Academic

Prerequisites

• Altar of Dementia on the battlefield
• Thunderblust on the battlefield
• Hardened Academic on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Thunderblust
2. When Thunderblust dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Hardened Academic triggers, putting a +1/+1 counter on Thunderblust
4. Resolve the Altar of Dementia ability
5. Repeat

Results

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