Sierra led Walker toward what he had believed to be a massive tree root, however, he was surprised to find it was more like a wall made of thousands of vines. When he touched the wall of vines he could feel a small amount of his mana get pulled and absorbed in to it. The tree really did absorb the mana which surprised him. He had not expected it to be so strong.
"I wouldn't stay in contact for too long with those vines, they will keep consuming your mana. It is better to let them absorb the excess from training than from contact." Walker heeded the warning and pulled back his hand. He didn't want to use any more mana and exhaust himself before he learned more from the day.
