Wear him out

You move quickly, dodging back and forth as you avoid the swings and charges of Karstuk, quickly jumping, dodging, ducking and weaving to avoid his blade. Thankfully, although there's a few close calls you manage to continuously avoid his strikes, leading to him quickly beginning to slow down his attacks.

Karstuk's fury and rage soon gets to him, as his fast, furious charging soon leaves him exhausted. His sword swings become sluggish, his dodges slow and his breathing ragged. You grin, knowing that the fight is twisting around in your favor, and it's time to turn on the offense.