Isochron Scepter + Emerald Charm + Swarm Intelligence

Isochron Scepter

Emerald Charm

Swarm Intelligence

How it works

1. Activate a permanent you control by tapping it, adding at least 3.
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 the permanent that can tap to produce at least 3.
4. Resolve both Emerald Charm copies, untapping Isochron Scepter and the permanent.
5. Repeat.