Isochron Scepter, Swarm Intelligence, Emerald Charm, and Lotus Field

Prerequisites

• Isochron Scepter on the battlefield
• Swarm Intelligence on the battlefield
• Emerald Charm in exile
• Lotus Field on the battlefield

Steps

1. Activate Lotus Field by tapping it, adding three mana of any color
2. Activate Isochron Scepter by paying and tapping it, casting a copy of Emerald Charm without paying its mana cost, targeting Isochron Scepter
3. Swarm Intelligence triggers, creating a copy of Emerald Charm, targeting Lotus Field
4. Resolve both Emerald Charms, untapping Isochron Scepter and Lotus Field
5. Repeat

Results

• Infinite magecraft triggers
• Infinite mana permanents you control can produce
• Infinite storm count
• Infinite untap of permanents you control