//In Crash Landing I designed the keep to have opened outer gate (with a drawbridge) then inner gate (closed until Hunter disintegrated it), then the reinforced door to lord's tower. I say don't worry about epic battles, sieges are boring.
Also, who's the king?//
Grace saw Hunter leap towards the keep at amazing speed. Her troops behind stopped in retreat, but didn't dare to attack themselves, especially as a catapult barrage started from inside. Being the size of a dwarf dragon, she wasn't an easy target. One of the stones finally got an impact course. She stopped and braced herself, then caught the rock, sinking a fair bit into the ground in the process, and threw it back at the keep tower, making it tremble. She planned to open the inner gate that way, but Hunter already did it.
General Hunter is reckless and chaotic. With the third party interfering, situation becomes complicated. I must be careful, she thought.
At this moment the defenders started to panic and lifted the bridge and formed the outer gate surrounded by a moat, locking Hunter inside the fortress.
"I do not break my promises," she bellowed, seeing her path obstructed by the heavy gate. She then leaped into the air and flapped her wings a few times to gain altitude and directed self towards the tower she presumed the lord to be hiding in. Arrows could simply bounce off her, but she remembered what happened with usually brittle steel swords and dodged and deflected them. Soldiers were inventive and ignited their arrows, some of them even counterintuitively cast ice spells on them. Grace landed by Hunter surrounded by archers with a loud thump and sprayed some icy water on the fires that flaming arrows already caused--she wasn't here for the destruction of the keep.
Not much of it, anyway.
#
"Mister Shashoh Long. Pleased to meet you," a silky tenor said. "I lost interest in the monster, it's not a dragon, doesn't have precious skin and certainly didn't have a crown. It lost its interest in Hazelwood. What about we get on board," he said, pointing at his ship, "and go to Terniar? I can still help your cause until I find another dragon, then I'm afraid I'd have to part."