What about caesar?
Also i realized a bit ago the swords king, sasaki, holdem, maybe who's who, etc where probably created in udon by queen
Even queen was supposed to have a trick sword originally
Oda seemingly had alot of ideas for the for the weapons and viruses queen created in udon but never actually dived into it sadly. Like we know that the beast pirates were supposed to have lots of dangerous weapons and some made of sea stone but i guess he didn't feel he had enough time for it. Which sucks ass tbh. Tho we did see the long range canons at least lol
If we dont get a mads reunion