Chapter 1169： infiltration

"Huh? Fang Heng, this in your hand is..."

Seeing Fang Heng's success in manipulating the magic circle, Sandy became interested and came over to observe.

"Oh roar? Is it a mental catalyst cube crystal?"

Fang Heng looked at Sandy, "You recognize it too?"

"Yeah, I saw it just now when I was looking up books on the third floor."

Sandy stared at the crystal in Fang Heng's hand, nodded and said: "The book said that the empire spent a lot of money on research and development,

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