Second Chance, and Silent Sentinel

Prerequisites

• Second Chance on the battlefield
• Silent Sentinel on the battlefield
• You have 5 or less life
• Opponents can not kill Silent Sentinel when you attack
• Silent Sentinel does not have summoning sickness

Steps

1. At the beginning of your upkeep, sacrifice Second Chance and take an extra turn
2. Attack with Silent Sentinel, returning Second Chance from your graveyard to the battlefield under your control
3. Pass the turn
4. Repeat

Results

• Infinite turns