I'm having some difficult deciphering all the words to Matt McGinn's "The Witches' Song" and I would appreciate some help. You can listen to the song on YouTube (click here).

Hie, tattie, tattie, tattie,
Hie come tattie tae;
Hie, tattie, tatie, tattie,
Hie come tattie tae.

If ye wander near the [burrs],
On the witches you may chance,
In the middle of the night they’re there
For necromantic dance. (Hie, tattie etc)

The weather must be drear,
The hour must be drab,
The [               ] on the fire
(--------) make his slab. (Hie, tattie etc)

When the lizard take the light
Then unleash the dog;
Fling them in tae bile wi’
The carcass o’ the (frog) (Hie, tattie etc)

Black spirits an’ white,
Red spirits an’ grey,
Mingle, mingle, mingle, mingle,
(-----------------------) (Hie, tattie etc)

Now the broth is brew’d
Now the dance is done,
We will fill our stomachs
For the feast is just begun. (Hie, tattie etc)

Hie, tattie, tattie, tattie,
Hie come tattie tae;
Hie, tattie, tatie, tattie,
Hie come tattie tae;