Altering Spell

Type: Transfiguration Spell
Range: 3000
Duration: 10 seconds

Alter the physical forms and features of items when cast within the Room of Requirement

How to Unlock the Altering Spell

Acquired by completing the Side quest, Interior Decorating:

Speak with Professor Weasley
Acquire 15 Moonstone by casting Evanesco on anything in the Room of Requirement.
Return to Professor Weasley
Conjure 5 Wall and Floor decorations.
Speak to Professor Weasley
Alter the color, size, and style of an item.
Alter the balcony or floor
Speak to Deek