Sage of Hours, Isochron Scepter, Bioshift, Workshop Elders, and Tamiyo's Journal

Prerequisites

• Sage of Hours on the battlefield
• Isochron Scepter on the battlefield
• Bioshift in exile
• Workshop Elders on the battlefield
• Tamiyo's Journal on the battlefield
• each turn available

Steps

1. At the beginning of your upkeep, Tamiyo's Journal triggers, creating a Clue artifact token
2. At the beginning of your combat phase, Workshop Elders triggers, causing the Clue to become a 0/0 artifact creature token and putting four +1/+1 counters on it
3. Activate Isochron Scepter by paying and tapping it, casting a copy of Bioshift without paying its mana cost, targeting the Clue that has +1/+1 counters on it and Sage of Hours
4. Sage of Hours triggers, putting a +1/+1 counter on itself
5. Resolve Bioshift, moving the four +1/+1 counters from the Clue onto Sage of Hours
6. The Clue dies as a state-based action due to having 0 toughness
7. Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one
8. Repeat each turn

Results

• Infinite turns