IZZY:
If I had my wand
I would Sectumsempra
If I had the chance
I'd kill you now

Why'd I let you live
Mercy clouds my vision
But I see you now
On Marauder's Map

ALL:
I solemnly swear that I'm up to no good
Mischief managed [x4]

IZZY:
I see Wormtail now
I see his pawprints coming
The trap is set
To catch that rat

Cruciatus curse
I will make you suffer
Avada Kedavra's
Too good for you

ALL:
I solemnly swear that I'm up to no good
Mischief managed [x4]

Avada Kedavra's
Too good for you...

(Delphi, Melvin, and Sam whispers)
Cruciatus, Sectumsempra, the killing curse [x2]

IZZY:
Victim of my spells (Cruciatus, Sectumsempra, the killing curse)
I can see you struggling (Cruciatus, Sectumsempra, ….)
Say goodbye

Avada Kedavra!

ALL:
I solemnly swear that I'm up to no good
Mischief managed [x4]

DELPHI:
I solemnly swear that I'm up to no good
I can see you struggling

MELVIN:
I solemnly swear that I'm up to no good
I'd kill you now

SAM:
I solemnly swear that I'm up to no good
I will make you suffer

IZZY:
I solemnly swear that I'm up to no good
On marauder's map

ALL:
Mischief managed [x3]