Buzz.
Lin Feng's mental power extended into the first spacetime crystal.
In reality, this was Lin Feng's second time using the spacetime crystal. Although it was somewhat useful, Lin Feng felt that it was not as miraculous as Ruler Starfield had described.
After all, the effect of using the spacetime crystal varied from person to person. For those Voidwalkers who had not comprehended the principle of spacetime, using the spacetime crystal might be very effective.
However, for a cultivator like Lin Feng, who had already comprehended the principle of spacetime and had a deep understanding of it, while this spacetime crystal could not be considered completely ineffective, its effect was greatly reduced.
Basically, the principle of spacetime was divided into several stages.