This spell was introduced by Professor Dyreth in term 5 during the second Transfiguration lesson.
This spell is used to turn everyday objects into another everyday object. It comes in handy when you need a pen in a jiffy or when you want to conceal the true nature of an object.
The proper incantation is Covadium. You must concentrate hard on what you want your object to change into.
A swish to the left bringing your wand down to tap the object only once.