Meanwhile, the roof of the tunnel seemed to crumble under some unseen weight, about to cave in on itself on top of the frontline of Valkyri warriors. Large chunks of rocks fell from the cavern ceiling, capable of burying vast portions of their forces as well as close off the tunnel from further assault. Thurion stuck his sword into the ground and extended his hand, palm facing upward. With eyes closed he proved his mastery of the Force by seizing possession of these falling rocks, causing them to slow to a stop mid-air.
A few nearby padawans realised what was happening, lending their strength to his cause by assuming command of the smaller rocks, leaving the larger ones to the Jedi Master. The smaller chunks were cast aside where they would do no harm. The big ones, however, Thurion sought a better use for.
Assured that he held them within his power, he thrust his hand forward, sending the chunks of falling rocks toward the enemy, looking to crush them underneath their own hubris. These Bryn may have strength of arms and superior numbers, but where the Force was concerned they would not out-perform a master practitioner of his caliber. He's been doing this for the last sixty years, and has only grown stronger with age.