Second Chance, Purgatory, Ajani Goldmane, and Opalescence

Prerequisites

• Second Chance on the battlefield
• Purgatory on the battlefield
• Ajani Goldmane on the battlefield
• Opalescence on the battlefield
• Your life total is exactly 3, 4 or 5
• each turn available

Steps

1. At the beginning of your upkeep, Second Chance and Purgatory's second ability trigger
2. Resolve the Second Chance trigger, causing you to sacrifice it and take an extra turn after this one
3. When Second Chance dies, Purgatory's first ability triggers, exiling it
4. Resolve the Purgatory trigger from step 1, causing you to pay and 2 life to return Second Chance from exile to the battlefield
5. Activate Ajani Goldmane's first ability by putting a loyalty counter on it, causing you to gain 2 life
6. Repeat each turn

Results

• Infinite turns