Alright, I feel like writing the fluff text from an IC perspective. Meet the very old, very powerful, nearly senile wizard who makes these things.
...Hm?
Oh...you want to know...about my creations, eh?
Well...the first one...was the courier capsule...back in the day...I was just an apprentice...had no phones...mail service was crap...carrier pigeons were a pain in the neck...needed a way to send messages...made a little flying box...worked great...so much safer than the Nevernever, you know...and you could send magic rings and stuff...not just letters...I'm still proud of that...after all these years...people still use these things...heck, they make all kinds of 'em...walking ones, swimming ones...Nevernever-travelling ones...all based on my design...sorry...probably don't wanna hear...an old man brag about his glory days...moving on...
Flying harness...was an old design...found it in this old book...it's like a witch's broom...moves you around...lets you fly...helps you dodge...real useful...used to make 'em for Wardens...looks creepy, I know...shaped like a disk...eyes on the bottom...wraps tentacles around you when you sit on it...but it works damn well...and now these kids...they make ones that look real nice...sorry...I'm rambling again...moving on...
Only ever made...two flying fortresses...one for the war against Kemmler...had to hide the children...he kept finding the hideouts...sending zombies...killing the kids...flying castle over the pacific was safe...well, safer...had to move it to the Nevernever after it got attacked...but it worked...kids lived...second one was made as a gift for Ferrovax...needed to apologize...wait...that's supposed to be secret...I didn't say anything...my first apprentice made a better one later...he was a good boy...
UFO...was a cheap joke...made it to mess with mortals...turned out to be a good design...made more...when we needed to round up hellcows...heh, that was fun...sorcerer stole the design...used it to collect human sacrifices...that wasn't so fun...but we put a stop to that...
The Mecha...I made for money...this mortal billionaire wanted to kick ass...wanted to move up the food chain...he was very specific...about how it should look...I think he was copying something he'd seen somewhere...dunno where...wish I did...this thing wasn't easy to make...the inspiration for it must've been impressive...maybe an Old God or something...anyway...later got an offer from this military guy...said he was with am-boss or something...wanted to buy another...but the Merlin said no...said it was risking the secrecy of magic...and likely to disrupt the world order...and anyway I didn't need money...can make anything I want with magic...raise a castle in an evening...and besides I'm already a multi-millionaire...turns out he was right...that's the Merlin for you...always looks out for me...I never realized I even had a bank account...the Council took care of it for me...so all a big waste of time...never needed the money in the first place...oh well...it was kinda fun...I'm drifting...
...I think that's all.
Hm. This was kind of an experiment. Not sure if it worked.