Melira, Sylvok Outcast, Woodfall Primus, and Altar of Dementia

Prerequisites

• Melira, Sylvok Outcast on the battlefield
• Woodfall Primus on the battlefield
• Altar of Dementia on the battlefield
• Woodfall Primus does not have a -1/-1 counters on it

Steps

1. Activate Altar of Dementia by sacrificing Woodfall Primus
2. Woodfall Primus's persist ability triggers, returning it to the battlefield
3. Woodfall Primus enters the battlefield, triggering its ability
4. Holding priority, repeat an arbitrarily large number of times
5. Resolve all Woodfall Primus abilities, destroying any number of noncreature permanents
6. Repeat
7. Resolve all Altar of Dementia's abilities, causing target player to mill cards equal to Woodfall Primus' power
8. Repeat

Results

• Destroy any number of noncreature permanents
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill