== ==
yes
Just get any fps maker app and go to weapon editing and make your weapon or, you could import or export a design of the weapon in to your weapon editing file. Then, make a map and design your characters. Finally you need to calculate the damage stuff.
As the goddess of Youth, she could make those who were old young again. You might think this a weapon if one who received this "gift" did not want it.
Proteins
weapon+poison
Yes, a scythe could be an extremely lethal weapon if it were constructed properly, had materials appropriate for the task, and a person had sufficent training in its use, a scythe could be a very devastating melee weapon in the right hands and circumstances.
weapon+poison
weapon+poison
Yes
What did you have in mind? It could be as simple as putting a couple of stones into an athletic sock. Really, a weapon of any sort isn't wholly defensive - they have offensive applications, as well.
There are so many different diseases that could be selected to make a weapon.
Hera used love and compassion to make the meanest people sweet so they could marry