Sarkon, one of the guards, ran up the ramparts. He was a lizardfolk, one of a few mercenary guards in the castle, in addition to the regulars. The green lizardfolk saw the dragon and how the attacks against it thus far were ineffective. By now, the dragon was flying just outside the castle walls, his reptilian head within reach of a polearm. Yelling out in his native draconic, the lizard leapt at the dragon, slashing with his halberd. The blade did minimal damage to the flying beast, but the dragon was surprised to see another speaker of draconic in the castle. Sarkon was only dressed in a loincloth, without the normal armor of the castle guard. He wasn't abnormally durable, but he knew that in this case, an average suit of armor armor wouldn't protect from the dragon's flame in any event. Agility was the only serious defense in this situation.