Mysterious Rusted Blade

The Mysterious Rusted Blade is a unique item found within the "Abandoned Facility". Once a player picks it up, the chat shows the words "Now you can never let it go...". Also, the item begins to gather data on how the user fights and how the user acts. After 365 Terrarian days inside the player's inventory, it will take the form of an extraordinarily powerful weapon. The possible weapons are almost endless, and tend to always become the wielder's favorite weapon.

However, it can not be used as a weapon of any sort until it evolves.

Tooltip:

"I...can see your inner power..."

"It flashes light a miniature sun..."

"...I... shall assist you..."

Can be used in:
 * Weathered Blades