Hellkite Charger + Fire Nation Palace + Isshin, Two Heavens as One

Prerequisites

• An opponent cannot block and kill Hellkite Charger

Steps

1. 1Activate Fire Nation Palace's second ability by paying and tapping it, giving Hellkite Charger firebending 4 until end of turn.
2. 2Declare Hellkite Charger as an attacker, triggering it and its firebending ability twice.
3. 3Resolve both Hellkite Charger firebending triggers, adding eight .
4. 4Resolve the first Hellkite Charger trigger, choosing not to pay.
5. 5Resolve the second Hellkite Charger trigger, causing you to pay to untap all attacking creatures and to get an additional combat phase after this one.
6. 6Repeat from step 2.

Effects

• Infinite combat phases
• Infinite red mana