Key

Lin Feng glanced at the four peak Voidwalkers. Seeing that their gazes were focused on the Overlord-level spacetime crystal, a smile appeared on his lips.

"Everyone, I've already studied a little of the Overlord-level spacetime crystal first. The effect is actually the same as peak spacetime crystals. It cannot allow our principle of spacetime to advance by leaps and bounds. However, this Overlord-level spacetime crystal is a crucial key!"

"Key?"

The few of them were very curious, not knowing what "key" Lin Feng was referring to.

However, Lin Feng did not answer directly. Instead, he said with a smile, "Just study it carefully."

Hence, Lin Feng flicked the Overlord-level spacetime crystal at the Black Ink Master directly.

The Black Ink Master reached out and caught the spacetime crystal.