Hellkite Charger, and Druids' Repository

Prerequisites

• Hellkite Charger on the battlefield
• Druids' Repository on the battlefield
• You control at least six other creatures that can attack this turn
• An opponent is unable to block and kill your creatures

Steps

1. Declare Hellkite Charger and six other creatures you control as attackers, triggering Druids' Repository seven times and Hellkite Charger
2. Resolve all Druids' Repository triggers, putting seven charge counters on it
3. Activate Druids' Repository seven times by removing seven charge counters from it, adding
4. Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures you control and to get an additional combat phase after this one
5. Repeat each combat phase

Results

• Infinite combat phases