Blocking stone

Blocking is an item in Sword Art Online: Integral Factor.

How To Acquire
They can be dropped by all bosses at random, and are very common drops in all dungeons.

Crafting
”Blocking Stones” are an item used to help improve equipment, specifically armour.

Here is the page with relevant information Blocking Stone. Sorry for this page, please you don't read this information, isn't the real information.