Lost Demon Knight

Not to Be Confused With The Lost Demon Knight Sword, or Lost Demon Knight Armor

Description
The Lost Demon Knight is a Secret Boss That Looks Like a Giant in Light Red Armor, With Red and Black Wings, and The Lost Demon Knight Sword on the Back

Strategy
Use the Radioactive Dragon Sword, Knight Sword, or Dark King Sword

Drops
The Lost Demon Knight Sword