A meat tenderizer and a pairing knife. (Okay okay he didn't use it to stab the dragon, but STILL. It's pretty insulting for it to have been the reason you get stabbed.)
[Auto Flex Mode] know how to be humiliatingly effective. It's CLEARLY been selecting only the most flashy and absurd ways to get shit done. Sure it could have selected the time thread where he went and got a real weapon and slayed it... OR how about we absolutely destroy it's fucking dignity with a kitchen set and flex on our former teammates just for the trills? Let's go with that one, making sure to pick the one where the dragon goes apeshit and kicks our former leaders ass at least twice, as a flex.