Charnelhoard Wurm, Savage Beating, and Sozin's Comet

Prerequisites

• Charnelhoard Wurm on the battlefield
• Savage Beating in hand
• Sozin's Comet in hand
• available

Steps

1. Cast Sozin's Comet by paying
2. Declare Charnelhoard Wurm as an attacker, triggering its firebending ability, adding
3. Holding priority, cast Savage Beating by paying , causing you to untap all creatures you control and get an additional combat phase after this one
4. Deal combat damage using Charnelhoard Wurm, triggering its ability, returning Savage Beating from your graveyard to your hand
5. Repeat from step 2

Results

• Infinite storm count
• Infinite combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite magecraft triggers
• Infinite combat damage