Answer:
Slayer of regrets, old and new, sought by many, found by few.
Different lights do make me strange, thus into different sizes I will change.
Without this, eating food and Steven Spielberg's career would be very different.
How can you burn an apple, blueberry, rose and pumpkin without leaving any ashes but retaining the smell of it?
A doctor might remove one from the neck of a Dracula victim.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?