Sage of Hours, Spellbinder, Beacon of Immortality, and Light of Promise

Prerequisites

• Sage of Hours on the battlefield
• Spellbinder on the battlefield
• Beacon of Immortality in exile
• Light of Promise on the battlefield
• Light of Promise attached to Sage of Hours
• Spellbinder attached to a creature that can attack this turn and that cannot be blocked and killed by an opponent
• Your life total is at least 5

Steps

1. Deal combat damage to an opponent using the creature that has Spellbinder attached
2. Spellbinder triggers, casting a copy of Beacon of Immortality without paying its mana cost
3. Resolve the copy of Beacon of Immortality, doubling your life total
4. Sage of Hours triggers, putting a number of +1/+1 counters on it equal to the life you gained
5. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one
6. Repeat each turn

Results

• Infinite turns