Burst of Energy in exile (exiled by Isochron Scepter).
All permanents on the battlefield.
You have not copied a spell using Chandra this turn.
Steps
Activate Lotus Field by tapping it, adding three mana of any color.
Activate Isochron Scepter by paying ({2} magic symbol) and tapping it, casting a copy of Burst of Energy without paying its mana cost, targeting Isochron Scepter.
Chandra and Displacer Kitten trigger.
Resolve the Displacer Kitten trigger, blinking Chandra.
Resolve the Chandra trigger, creating a copy of Burst of Energy, targeting Lotus Field.
Resolve both Burst of Energies, untapping Isochron Scepter and Lotus Field.