Enter Wiseacres Wizarding Equipment in Diagon Alley and speak to the vendor upstairs to enter the following codes to unlock the spell.

Effect	Password
Accio	VE9VV7
Anteoculatia	QFB6NR
Calvorio	6DNR6L
Colovaria	9GJ442
Engorgio Skullus	CD4JLX
Entomorphis	MYN3NB
Flipendo	ND2L7W
Glacius	ERA9DR
Herbifors	H8FTHL
Incarcerous	YEB9Q9
Locomotor Mortis	2M2XJ6
Multicorfors	JK6QRM
Redactum Skullus	UW8LRH
Rictusempra	2UCA3M
Slugulus Eructo	U6EE8X
Stupefy	UWDJ4Y
Tarentallegra	KWWQ44
Trip Jinx	YZNRF6