Edwin was struggling to keep up with the flurry of movement with which Sebastian was assaulting him. After he had fallen, he had pumped necromantic mana into his feet and kicked at the vampire, which had made him stagger.
Before Edwin could celebrate, Sebastian had gotten his footing under control and had kicked Edwin between the ribs. Or attempted to, at least, for Edwin managed to grab his foot at the last minute and to pump it with enough necromantic mana to make the red head scream.
Then Sebastian had chuckled and backed away. That had allowed Edwin to finally get up from the cold sand and to run up to Sebastian, which turned out to be a mistake.
Now he was endeavoring to meet the man blow for blow and to try and at least nick him. For that had been their agreement. Sebastian was not pulling his punches and he, quite literary, was setting out to punch his throat with his free hand every so often.