Blocking Stone

Blocking Stone is a transformation item in Sword Art Online: Integral Factor.

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Details
Material used to transform equipment.

Used for transforming Shields and Armor from one-starred to two-starred equipment.

How to get
It's an uncommon drop item obtained from any monster. Drop rate is higher for Dungeon monsters and floor bosses.

Certain subquests have this item as a completion reward item.

It's obtainable in Daily Dungeons under Equipment Transformation Version.