Basri's Lieutenant + Serra Redeemer + Altar of Dementia

Prerequisites

• You control at least one additional creature with a +1/+1 counter on it.

Steps

1. 1Activate Altar of Dementia by sacrificing another creature with a +1/+1 counter on it.
2. 2The creature dies, triggering Basri's Lieutenant's second ability, creating a 2/2 Knight creature token.
3. 3When the Knight enters the battlefield, Serra Redeemer triggers, putting two +1/+1 counters on the Knight.
4. 4Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to the sacrificed creature's power.
5. 5Repeat.

Effects

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