Emerald Charm in exile (exiled by Isochron Scepter).
All permanents on the battlefield.
Steps
Activate Basalt Monolith's first ability by tapping it, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
Activate Isochron Scepter by paying ({2} magic symbol) and tapping it, casting a copy of Emerald Charm without paying its mana cost, targeting Isochron Scepter.
Swarm Intelligence triggers, creating a copy of Emerald Charm, targeting Basalt Monolith.
Resolve both Emerald Charms, untapping Isochron Scepter and Basalt Monolith.