Chicokc

“The scales of a full-grown dragon were harder than steel, and even those arrows that struck home seldom penetrated enough to do more than enrage the great beasts. But as Meraxes banked above the Hellholt, a defender atop the castle’s highest tower triggered a scorpion, and a yard-long iron bolt caught the queen’s dragon in the right eye. Meraxes did not die at once, but came crashing to earth in mortal agony, destroying the tower and a large section of the Hellholt’s curtain wall in her death throes.”
― George R.R. Martin, Fire & Blood