* Boggarts are creatures in the Harry Potter universe that transform into your worst fear.
* Lord Voldemort is the main antagonist in the Harry Potter series, often referred to as "He-Who-Must-Not-Be-Named" or "Lord Voldemort." He is a powerful dark wizard and Harry Potter's arch-nemesis.
Perhaps you're thinking of a specific LEGO Harry Potter game or scene where a boggart appears and you're mistaking it for a character called "Lord Boggart"?
Could you provide more context about where you encountered this name?