1. Billhook is a 'spear' that can do anything... except deal electrical/energy edge, automatically making it worthless. Blade is supposed to be the regular attack of sorts, but it's easier to just list it as a special attack (none of which have cooldowns, by the way). Base damage is a static value because I wanted each special attack to have its own damage range, and having damage range on top of damage range would be a bit weird.
2. Meteor hammer is, in real life, a chinese semi-bullshido weapon (semi because a chain with a hefty weight on its end is ultimately a perfectly practical weapon). I just thought that a 'ranged sledgehammer' would be a really funny thing to exist and basically that's the whole story behind its creation.
The joint Melee/Throwing modificiation of the attack's properties is an odd concept based on the fact that, with certain weapons, such as a tomahawk, the motion of throwing them is almost identical to the motion of striking with them, which is why Meteor Hammer's special attack has a more Melee-dependent scaling at closer range and switches to being more Throwing-dependent at a distance.
With the way I drew this weapon, it almost looks like it should deal heat damage or even explode on impact, kinda regret not adding that as a property now.
Stats are arbitrary because these are only concepts (duh).