At the "Tournament of Precious Stones", there were two special people who performed certain functions. The first was a man in a white mantle, an experienced "Summoner" of the Erden Family. He healed all the participants, and with the help of Earth Golem brought the arena into proper form.
The second such person was a girl dressed in black from the Cross Family. Her job was to announce the winner, as well as to intervene in dangerous situations.
Katlyn's last attack would have killed Vinor. She didn't realize it herself, but to a stronger magician it was obvious. Vinor would have burned to the ground in seconds. Sure, he probably would have been saved, but why bring it to such a sad outcome when everything could be solved in a much simpler way?