Isochron Scepter + Swarm Intelligence + Burst of Energy + Basalt Monolith

Isochron Scepter

Swarm Intelligence

Burst of Energy

Basalt Monolith

How it works

1. Activate Basalt Monolith's first ability by tapping it, adding CCC.
2. Activate Isochron Scepter by paying 2 and tapping it, casting a copy of Burst of Energy without paying its mana cost, targeting Isochron Scepter.
3. Swarm Intelligence triggers, creating a copy of Burst of Energy, targeting Basalt Monolith.
4. Resolve both Burst of Energies, untapping Isochron Scepter and Basalt Monolith.
5. Repeat.