You're walking on the SFOTH map alone, wielding the Linked Sword to protect yourself and the Lantern incase it goes dark. After walking for a bit, the SFOTH map is consumed by darkness, the light of your lantern being your only light.

After 10 seconds, the shadow subsides, and a dark, shadowy figure appears, with many darkhearts stabbed through it, above its right knee, one on his head, shoulder, and one pierced through its forearm... Although, it doesn't feel pain... infact, it's smiling... with its completely black eyes.

hellooooooooo... It says in a terrifying, yet wispy voice, holding its Darkheart at you.