Oyvind did not answer to that provocation, but his expression was worth a thousand words and made Dag understand that his enemy feared his strength very much, even though he had tried to hide it until then.
During their exchange of glances, two strips of blood, starting from Dag's chest and sliding down the dune, reached a point behind Oyvind and joined in a small puddle.
The dark fluid, instead of enveloping the body of its creator, this time traveled quickly along its blood, as if it was a flame on a trail of gasoline: in less than a second, it encircled Oyvind and reached the pool of blood behind him, from which a dark blade was fired upwards at great speed, piercing the body of the enemy, who didn't even have time to think.
This's an experimental test for reading assistance in case.
We highly recommend you to enjoy the beauty of the original words.