Hagrid is in the House!

Brittle, glass spiders
Creatures of obsidian
Reside in my chest

I feel them moving
Through my heart and down my spine
There are more than one

Soft tissue gives way
The shrapnel of who I am
Rends me with sharp spines

Tweezers of pure thought
Probing deep within my flesh
Until -- clink! -- got you!

I pull out the thing
Captured between hard pincers
Black spines squirm, rippling

I could just crush it
Shatter it between the tongs
But I show mercy

I open the door
And release the thing outside
Into the night snow

It scuttles away
It's no longer my problem
But there are still more

Tweezers of pure thought
Probing deep within my flesh
Until -- clink! -- got you!