Scute Mob, Bioshift, Sage of Hours, and Isochron Scepter

Prerequisites

• Scute Mob on the battlefield
• Bioshift in exile
• Sage of Hours on the battlefield
• Isochron Scepter on the battlefield
• You control at least five lands
• At least four +1/+1 counters on Scute Mob
• available

Steps

1. Activate Isochron Scepter by tapping it and paying , casting a copy of Bioshift without paying its mana cost, targeting Scute Mob and Sage of Hours
2. Sage of Hours triggers, putting a +1/+1 counter on itself
3. Resolve the Bioshift copy, moving four +1/+1 counters from Scute Mob onto Sage of Hours
4. Activate Sage of Hours by removing all +1/+1 counters from it, generating an extra turn after this one
5. At the beginning of your extra turn's upkeep, Scute Mob triggers, putting four +1/+1 counters on itself
6. Repeat

Results

• Infinite turns