One of the first few Skills added to the world of Avalar. The boxes you find/trade for can be opened (At the appropriate level) by clicking on them in your inventory.

Tier # Lockbox Type Platinum Coins Dropped Base Exp Base Timer
Tier 1 Bronze Lockbox 5 - 10 90 EXP 300 Seconds

Tier 2

Iron Lockbox 10 - 20
Tier 3
Tier 4