I'm planning a level 17 short campaign that ends with a fight with an ancient solar dragon, but I find that the original statblock was rather lackluster, so I wanted to expand on it and make it more interesting. I've taken inspiration from the Greatwyrm statblock, as well as this post. All distance are in meters because it was easier for me, multiply by 3.3 to get feets.
I wanted to try something original with preventable delayed AOE shaping the arena, as well as some synergies with the pushback attacks the dragon has to try and shove ennemies in them. I wonder if the damage output of the dragon is too high, so I'm interested in hearing opions on that. I'm also wondering if the distances and range make sense.
I could not find a way to mark it on my editor but it has 3 base legendary actions.