Lin Wu didn't want to directly use the effect of the sapphire meridians as he wouldn't be able to tell how much of a difference they made in his strength. Choosing to use his own power first would give him a good way to compare them.
At first, he lightly tapped with his tail onto the barrier and saw no effect. The barrier stood there as strong as ever. Lin Wu then increased his power and used about a quarter of his strength.
~thud~
The barrier was still able to bear it and did not show any change.
"Okay, time to amp it up more." Lin Wu said as he now used fifity percent of his strength.
~DENG~
The barrier finally showed some effect and slightly flickered. Lin Wu could tell that while it had successfully taken the blow, it may not be able to take multiple of the same level attacks.
~DENG~
