2nd Core
A Core that is used in Combination with combine books to craft items
Etc. Items
Sell Price at Black Trader: 500G-4K 
Gold
How to Obtain:
Use 
Magic Extraction Scroll on any green name items between level 10-20.
Obtained by opening 
Dungeon Chest 20 & Dungeon Treasure 20
Used:
Use with other items in Combine book to craft items.
with 
Combine Book I
Longsword = Gold (300) + Dull Longsword + 
Red Coral + 2nd Core (10)
Composite Bow = Gold (300) + 
Worn Shortbow + Red Coral + 2nd Core (10)
Magician Staff = Gold (300) + 
Cedar Staff + Red Coral + 2nd Core (10)
Round Shield = Gold (300) + 
Hard Scale (x5) + 2nd Core (10)
Skull Shield = Gold (500) + Hard Scale (20) + 2nd Core (40) + 
6th Core (2)
Mitten = Gold (300) + 
Spider Silk (5) + 
Mystic Oil + 2nd Core (10)
Heavy Leather Belt = Gold (400) + 
Heavy Leather (20) + 2nd Core (15)
Related Items: 
1st Core
2nd Core
3rd Core
4th Core
5th Core
6th Core
7th Core
Notes:
A stack is equal to 99 Cores.