Zethi, Arcane Blademaster, and Teferi's Protection

Prerequisites

• Zethi, Arcane Blademaster on the battlefield
• Teferi's Protection in exile
• each turn available

Steps

1. Declare Zethi as an attacker, triggering its ability, copying Teferi's Protection and causing you to pay to cast the copy from exile
2. Resolve the Teferi's Protection copy, causing your life total to be unable to change until your next turn and causing all permanents you control to phase out
3. Repeat during each of your turns

Results

• Permanents you control phase out during your opponents' turns
• Your life total can't change during your opponents' turns