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Uploaded by Anonymous #F324
 2480x3507 PNG 949 kB
Size: 2480x3507 | Tagged: safe, artist:rex-equinox, derpibooru import, part of a set, smolder, comic, commission, image, inanimate tf, locomotive, onomatopoeia, png, sound effects, story included, train, transformation

Description:

Her back end would square up with having vents opened up to let her new engine breath. She was now growing windows, doors, and buffers at her back end. A set of lights would start to take shape above her new rear cab.