Time Vault, and Frenzied Fugue

Prerequisites

• Time Vault on the battlefield
• Frenzied Fugue in hand
• available

Steps

1. Cast Frenzied Fugue by paying
2. Frenzied Fugue enters the battlefield attaching to Time Vault, utapping it
3. Activate Time Vault by tapping it, causing you to take an extra turn after this one
4. At the beginning of your next upkeep, Frenzied Fugue triggers, untapping Time Vault
5. Repeat from step 3

Results

• Infinite turns