This entrance has seen better days.  The stones are a bit askew, and have lots of mosses growing on them.  But there is also a magical quality about this entrance.  It is not something you see, but rather feel.  And every now and then you can catch a shimmer out of the corner of your eye.
Entrance to castle, Outside Castle
knight
dragon
I am a dragon living in the mountains. I enjoy hoarding treasure. I terrorize the local populace for fun.
Shall I burn you today, little knight man? You can try, mighty dragon! But I think you'll find yourself outmatched! Why is your castle so run down, little knight? This is not my castle, but perhaps because trespasser like you keep wandering in. I have enough treasure hoarded to rebuild this castle 100 times! Your king is just poor. How dare you insult the king! Take this, dragon! I wish you didn't do that. What do you think I'm going to do with this stone? I may have an idea or two, don't even think about it! Then apologize and give me all of your treasures. Also, tell me I'm pretty. I shall do no such thing, but perhaps we could strike a deal. I am willing to listen, although these stupid fairy lights are distracting. Well, if you agree to never tread on these lands again, then our fighting shall cease.