Normally they're not used; they weren't historically a military weapon. They were more for show. Used in pairs, the hooks could be linked together and the pair could be used as a flail with that pointy bit at the back end being sharpened and used as the blade.
"All swords shown may not be historically accurate in size, scale, naming, or shape."
What is the point of this image, then? I wanted to learn something accurate. Screw you, Internet.
As an opponent's sword clashes against it, the wave pattern causes their sword to vibrate as it slides across. A flamberge wielder would be used to it, but their opponent might drop their sword or have their arm numbed by the vibration.
It's name also means "fire sword" or something to that extent. It's because while the metal heated over the coals, the sword would form that pattern. Flamberges are also classified as zweihanders. (Flaam-burrje)
I think so. Halberds, pikes, and poleaxes were effective but I'm 98.6% sure that there were fairly long hand/hand and a half swords that could be used to tickle a rider.
What is the point of this image, then? I wanted to learn something accurate. Screw you, Internet.
Not an actual (horse) slayer...