Remelia didn't end it with one attack.
In the time Valerie spent dodging, she'd already corrected her posture and started walking down the corridor to track her.
She pushed her hands to the side, creating heat barriers that blocked off the nearby corridors. She wouldn't let Valerie escape a second time.
Luckily for her, escape wasn't in the plan anymore.
When Valerie returned to the corridor, she was ready for war.
BOOM!
Valerie had abilities very similar to Elvira. Wood was most definitely an element that could take one to the top of the world, however, it couldn't do so on its own.
The element had just as many drawbacks as it did advantages. Unless one could expand it beyond just wood and vines, one wouldn't be able to achieve anything at all.
It was a problem that a lot of the base elements shared. To raise their power beyond the worldly limits imposed on them was vital.