Zethi, Arcane Blademaster, and Savage Beating

Prerequisites

• Zethi, Arcane Blademaster on the battlefield
• Savage Beating in exile
• Savage Beating exiled with a kick counter on it
• Zethi does not have summoning sickness
• An opponent is unable to block and kill Zethi
• Creatures you control can tap to produce at least

Steps

1. Declare Zethi as an attacker, attacking an opponent unable to block and kill it
2. Zethi triggers
3. Holding priority, activate all mana-producing creatures you control by tapping them, adding at least
4. Resolve the Zethi trigger, causing you to pay to cast a copy of Savage Beating
5. Resolve the Savage Beating copy, untapping all creatures you control and causing you to get an additional combat phase after this one
6. Repeat each combat phase

Results

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