Zach had only made soft and flexible worms with his skill, Material Extraction. As if that wasn't enough, he almost exclusively used the skill on biological materials. He had used it on plants, herbs, flowers, monsters, muscles, and skeletons. Occasionally, he had used it on treasures similar to the mountain essence or gems.
He hadn't used it on just stone.
But not having done it before didn't mean he couldn't do it. There was a first for everything, including extracting worms out of chunks of stone.
Zach had a vague idea of what he was going to use the worms for. He had that image in the front of his mind as he put his hand against the stone wall and focused on the skill. Slowly, he tensed his fingers and pulled them inward like he was pinching a cloth draped over the stone.
He frowned.
It was tougher than he was used to. It was like the stone was resisting him.