Premium Trading is a shop in the MCC Island hub. It is the go-to place to spend your gems for all kinds of items. The shop's merchant - Merchant Barney - only accepts 
Gems as a currency. Premium Trading's Stock is constant, meaning it doesn't restock at all. Players can buy items infinitely, provided they have enough currency.
Stock Table
Merchant Barney has the following items in stock:
| Item | Cost |
|---|---|
 Bronze Treasure Chest
|
50
|
 Silver Treasure Chest
|
150
|
 Golden Treasure Chest
|
450
|
 Magical Material Crate
|
50
|
 Mechanical Material Crate
|
50
|
 Natural Material Crate
|
50
|
 Oceanic Material Crate
|
50
|
 Common Cosmetic Crate
|
10
|
 Uncommon Cosmetic Crate
|
30
|
 Rare Cosmetic Crate
|
75
|
 Epic Cosmetic Crate
|
150
|
 Legendary Cosmetic Crate
|
250
|
 Mythic Cosmetic Key
|
750
|
 Legacy Key
|
350
|
 Mystery Relic Crate
|
60
|
 Prismatic Chroma Pack
|
200
|
 Rare Quest Scroll
|
10
|
 Epic Quest Scroll
|
20
|
 Legendary Quest Scroll
|
35
|
 Task Reroll Token
|
3
|
 Quest Refresh Token
|
10
|