Isochron Scepter + Swarm Intelligence + Emerald Charm + Lotus Field

Isochron Scepter

Swarm Intelligence

Emerald Charm

Lotus Field

How it works

1. Activate Lotus Field by tapping it, adding three mana of any color.
2. Activate Isochron Scepter by paying 2 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.