Title - Jack o lantern!

Poem -

(I have chosen - "Jack o lantern - pumpkin carving" as a classic monster!)

I come once a year
To ward off the evils
With the lantern inside

I come with a close-up smile
Ready to take in the bad
Pushing the dark away

I come to have fun with kids
Carving and lighting, they enjoy
Putting me into the perfect shape

I come as a round ball
And pals call me jack o' lantern
As I sway away from the stingy JACK