[FairyKing]

I see your Sword But Big and Sword But Gun (and Sword But Two Of Them And Also Shuriken), but Sword But Trident wins for me. I was found it weird at first how blatantly out-of-scale the trident mode is, and it's not how I would've designed a trident/sword (I would've used a sliding crossguard, but I guess they were saving that for Xross Saber) but I love its visual design and the reversing blade concept. But what makes it my favorite is a neat little detail I noticed in its functioning: Durandal's time-erasing ability basically creates "gaps" in time, and pulling the Kaiji's blade from the hilt to activate that power also creates a "gap" in the sword itself!

My second favorite is Noroshi just because I love its transformation song so much. Fly! Smog! Sting! Steam! Konchuu Chu Daihyakka~