A witch's brew

A cauldron on the fire, bubbling away
A black cat in the corner, watching witch's play
A pinch of this, a pinch of that
Old hag cackling, in her pointy hat
A handful of worms, a thorn from a rose
Slime from slugs, and snot from her nose
Toe nail cuttings, some fur from a rat
And just pluck a whisker from her own black cat
These are what you need to make a witch's brew
I wonder who it's meant for, could it be YOU?
What will it turn you in to? maybe a bug
Or a giant ogre who lives in the woods
I know who it's meant for, it's me, i was mean
And now i'm a toad all slimy and green