"They swarm like clouds and desperately seek the protector's blood."
―"Guidepost for the Protectors" Chapter 11 Clause 9


Strike the eye in the center which will cause a flurry of enemies to attack you. If you manage to send some enemies flying onto grey mound then you’ll get Chrono Heart. Otherwise, kill the enemies before time runs out (if you continue to be unsuccessful the enemies will become weaker in the later waves). Afterwards, hop into the middle to end the mission.