transmogrification

The act of transmogrifying, or the state of being transmogrified; transformation. [Colloq.]

Clive, who wrote me about the transmogrification of our schoolfellow, an attorney's son.

noun

The process or result of changing from one appearance, state, or phase to another: change, changeover, conversion, metamorphosis, mutation, shift, transfiguration, transformation, translation, transmutation, transubstantiation. See change/persist.

The noun has one meaning:

Meaning #1: the act of changing into a different form or appearance (especially a fantastic or grotesque one)