Horntail damage

Depends on the part

Tail = 25k touch

Wings = 10-12k touch

Legs = 10-11k touch

Hands = Less than 6k touch

Heads = 10k touch.

The legs can do upwards of 15k if they have attack up. That's why some people say the tail does over 30k.

As for non-touch damage, it's pretty simple. The tail does as high as 7.9k and the legs can do 9.8k. Once the legs and tail are dead but the wings are alive, you'll see magic damage do about 7.5k. Once the wings are dead, his magic does no more than 5.5k.