Answer:
I invade your home once a yearโฆbut only if youโve been good.
I start with T end with T and within me is T.
What begins with T ends with T and has T in it?
So cold damp and dark I am. To stay you would refrain yet those who occupy me do never complain.
I am in truth a yellow fork from tables in the sky by inadvertent fingers dropped the awful cutlery. Of mansions never quite disclosed and never quite concealed the apparatus of the dark to ignorance revealed.
A little house full of meat, no door to go in and eat.