A descrição da habilidade Presença Terrível diz:
Frightful Presence (Ex)
A young adult or older dragon can unsettle foes with its mere presence. The ability takes effect automatically whenever the dragon attacks, charges, or flies overhead. Creatures within a radius of 30 feet × the dragon’s age category are subject to the effect if they have fewer HD than the dragon. A potentially affected creature that succeeds on a Will save (DC 10 + ½ dragon’s HD + dragon’s Cha modifier) remains immune to that dragon’s frightful presence for 24 hours. On a failure, creatures with 4 or less HD become panicked for 4d6 rounds and those with 5 or more HD become shaken for 4d6 rounds. Dragons ignore the frightful presence of other dragons.
Os dragões têm categorias etárias que variam de um wyrmling ao grande wyrm. Que número deve ser usado para calcular o alcance da habilidade Presença Terrível?