Learn to cast the Stag Patronus
With this spell you must stay focused
With bright lights kill Dementors with each blow

They're a threat since you keep fainting
On the train you're knocked out coldly
They quite frequently disrupt your scar

You'll be schooled by this werewolf bloke
Blast creepies into smithereens
The guards at Azkaban that give you the willies
Dark robes hide their abnormalities

You're through with the strife of getting contusions
Passed out on brooms at Quidditch games
You've just got to cast this the Stag Patronus
Helps to avoid you getting maimed
That's a pain!

[Guitar Solo as Lupin teaches Harry the spell]

This spell cuts like a knife, A magic solution
Cause the Death Eaters got them paid
Just make sure to cast this the Stag Patronus
And the Grim Reapers will sure fade

Knocked out cold them eat some chocolate
They'll chow on your soul like an omelet
Happiness is gone, It's quite bizarre

You're not doomed now Harry Potter
Once you've learned this you will slaughter
An A's your grade
Go rip these rotters all the hell apart!