Currency - Echoing Shard

[CollinHerber]

Summary

Expanding on the Currency work started here: https://github.com/Path-of-Terraria/PathOfTerraria/issues/437 A new currency should be available the "Echoing Shard"

Using an echoing shard should create a mirror copy of that item. It can only be used on Magic & Rare Items

Rarity: EXTREMELY Rare - One of the rarest items in the game.

Reasonings

Cloning of the most end-game items

[pilchardheck]

[pilchardheck]