Isochron Scepter, Officious Interrogation, and Time Sieve

Prerequisites

• Isochron Scepter on the battlefield
• Officious Interrogation in exile
• Time Sieve on the battlefield
• Officious Interrogation exiled by Isochron Scepter
• A player controls at least five creatures
• each turn available

Steps

1. Activate Isochron Scepter by paying and tapping it, casting a copy of Officious Interrogation without paying its mana cost
2. Resolve the copy of Officious Interrogation, creating at least five Clue artifact tokens
3. Activate Time Sieve by tapping it and sacrificing five Clues, causing you to take an extra turn after this one
4. Repeat each turn

Results

• Infinite turns