As of Terraria 1.1, weapons can have random prefixes that affect their stats. There seem to be legendary attributes that are unambiguously better than all the others:
- Legendary for melee weapons
- Unreal for ranged weapons
- Mythical for magic weapons
However, apparently not every weapon can have them. In my experience, tools, despite doubling as melee weapons, can never become Legendary, no matter how much money you throw at the Goblin Tinkerer. I also spent about a fortune on reforging Gungnir without getting anything above Godly.
So, which weapons can't have these legendary attributes, and what are their best attributes?