There were some major reasons it was not advisable to use skills before advancing to the Cosmic Pearl realm and the most important of them all was that the body of an Energy sensing Realm cultivator could not possibly handle the strain.
As long as they are given time, they could manage to harness enough Cosmic energy to use a 1st-grade skill, however, without the Energy supply of a Cosmic Pearl minimizing the strain, the damage could prove fatal or at the very least, Cultivation damaging.
Selina, however, was not in danger of such thanks to her incomplete Pearl minimizing the strain.
Selina's smile widened,
"1st-grade skill: Tiger's claw"
She summoned a ring and out of it, materialized a claw composed of Cosmic Energy.
The energy of the Skill held Marla down and prevented her from moving out of the way.
Arnold grinned and cast a sideways glance at Hal,
"It's over."
He said and Hal closed his eyes and smiled,